28771820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1$

素因数の和:208

約数の個数: 144

約数和(自身を含む): 81702432

約数和(自身を除く): 52930612

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 17, 20, 22, 28, 34, 35, 44, 49, 55, 68, 70, 77, 85, 98, 110, 119, 140, 154, 157, 170, 187, 196, 220, 238, 245, 308, 314, 340, 374, 385, 476, 490, 539, 595, 628, 748, 770, 785, 833, 935, 980, 1078, 1099, 1190, 1309, 1540, 1570, 1666, 1727, 1870, 2156, 2198, 2380, 2618, 2669, 2695, 3140, 3332, 3454, 3740, 4165, 4396, 5236, 5338, 5390, 5495, 6545, 6908, 7693, 8330, 8635, 9163, 10676, 10780, 10990, 12089, 13090, 13345, 15386, 16660, 17270, 18326, 18683, 21980, 24178, 26180, 26690, 29359, 30772, 34540, 36652, 37366, 38465, 45815, 48356, 53380, 58718, 60445, 74732, 76930, 84623, 91630, 93415, 117436, 120890, 130781, 146795, 153860, 169246, 183260, 186830, 205513, 241780, 261562, 293590, 338492, 373660, 411026, 423115, 523124, 587180, 653905, 822052, 846230, 1027565, 1307810, 1438591, 1692460, 2055130, 2615620, 2877182, 4110260, 5754364, 7192955, 14385910, 28771820]

約数ペア:

[(1, 28771820), (2, 14385910), (4, 7192955), (5, 5754364), (7, 4110260), (10, 2877182), (11, 2615620), (14, 2055130), (17, 1692460), (20, 1438591), (22, 1307810), (28, 1027565), (34, 846230), (35, 822052), (44, 653905), (49, 587180), (55, 523124), (68, 423115), (70, 411026), (77, 373660), (85, 338492), (98, 293590), (110, 261562), (119, 241780), (140, 205513), (154, 186830), (157, 183260), (170, 169246), (187, 153860), (196, 146795), (220, 130781), (238, 120890), (245, 117436), (308, 93415), (314, 91630), (340, 84623), (374, 76930), (385, 74732), (476, 60445), (490, 58718), (539, 53380), (595, 48356), (628, 45815), (748, 38465), (770, 37366), (785, 36652), (833, 34540), (935, 30772), (980, 29359), (1078, 26690), (1099, 26180), (1190, 24178), (1309, 21980), (1540, 18683), (1570, 18326), (1666, 17270), (1727, 16660), (1870, 15386), (2156, 13345), (2198, 13090), (2380, 12089), (2618, 10990), (2669, 10780), (2695, 10676), (3140, 9163), (3332, 8635), (3454, 8330), (3740, 7693), (4165, 6908), (4396, 6545), (5236, 5495), (5338, 5390)]