18903808220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{269}}^1\times {\mathrm{409}}^1$

素因数の和:780

約数の個数: 144

約数和(自身を含む): 44522654400

約数和(自身を除く): 25618846180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 121, 142, 220, 242, 269, 284, 355, 409, 484, 538, 605, 710, 781, 818, 1076, 1210, 1345, 1420, 1562, 1636, 2045, 2420, 2690, 2959, 3124, 3905, 4090, 4499, 5380, 5918, 7810, 8180, 8591, 8998, 11836, 14795, 15620, 17182, 17996, 19099, 22495, 29039, 29590, 32549, 34364, 38198, 42955, 44990, 49489, 58078, 59180, 65098, 76396, 85910, 89980, 95495, 98978, 110021, 116156, 130196, 145195, 162745, 171820, 190990, 197956, 210089, 220042, 247445, 290390, 319429, 325490, 381980, 420178, 440084, 494890, 550105, 580780, 638858, 650980, 840356, 989780, 1050445, 1100210, 1210231, 1277716, 1597145, 2100890, 2200420, 2310979, 2420462, 3194290, 3513719, 4201780, 4621958, 4840924, 6051155, 6388580, 7027438, 7811491, 9243916, 11554895, 12102310, 13312541, 14054876, 15622982, 17568595, 23109790, 24204620, 26625082, 31245964, 35137190, 39057455, 46219580, 53250164, 66562705, 70274380, 78114910, 85926401, 133125410, 156229820, 171852802, 266250820, 343705604, 429632005, 859264010, 945190411, 1718528020, 1890380822, 3780761644, 4725952055, 9451904110, 18903808220]

約数ペア:

[(1, 18903808220), (2, 9451904110), (4, 4725952055), (5, 3780761644), (10, 1890380822), (11, 1718528020), (20, 945190411), (22, 859264010), (44, 429632005), (55, 343705604), (71, 266250820), (110, 171852802), (121, 156229820), (142, 133125410), (220, 85926401), (242, 78114910), (269, 70274380), (284, 66562705), (355, 53250164), (409, 46219580), (484, 39057455), (538, 35137190), (605, 31245964), (710, 26625082), (781, 24204620), (818, 23109790), (1076, 17568595), (1210, 15622982), (1345, 14054876), (1420, 13312541), (1562, 12102310), (1636, 11554895), (2045, 9243916), (2420, 7811491), (2690, 7027438), (2959, 6388580), (3124, 6051155), (3905, 4840924), (4090, 4621958), (4499, 4201780), (5380, 3513719), (5918, 3194290), (7810, 2420462), (8180, 2310979), (8591, 2200420), (8998, 2100890), (11836, 1597145), (14795, 1277716), (15620, 1210231), (17182, 1100210), (17996, 1050445), (19099, 989780), (22495, 840356), (29039, 650980), (29590, 638858), (32549, 580780), (34364, 550105), (38198, 494890), (42955, 440084), (44990, 420178), (49489, 381980), (58078, 325490), (59180, 319429), (65098, 290390), (76396, 247445), (85910, 220042), (89980, 210089), (95495, 197956), (98978, 190990), (110021, 171820), (116156, 162745), (130196, 145195)]