21136780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:223

約数の個数: 96

約数和(自身を含む): 54867456

約数和(自身を除く): 33730676

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 83, 85, 107, 119, 140, 166, 170, 214, 238, 332, 340, 415, 428, 476, 535, 581, 595, 749, 830, 1070, 1162, 1190, 1411, 1498, 1660, 1819, 2140, 2324, 2380, 2822, 2905, 2996, 3638, 3745, 5644, 5810, 7055, 7276, 7490, 8881, 9095, 9877, 11620, 12733, 14110, 14980, 17762, 18190, 19754, 25466, 28220, 35524, 36380, 39508, 44405, 49385, 50932, 62167, 63665, 88810, 98770, 124334, 127330, 150977, 177620, 197540, 248668, 254660, 301954, 310835, 603908, 621670, 754885, 1056839, 1243340, 1509770, 2113678, 3019540, 4227356, 5284195, 10568390, 21136780]

約数ペア:

[(1, 21136780), (2, 10568390), (4, 5284195), (5, 4227356), (7, 3019540), (10, 2113678), (14, 1509770), (17, 1243340), (20, 1056839), (28, 754885), (34, 621670), (35, 603908), (68, 310835), (70, 301954), (83, 254660), (85, 248668), (107, 197540), (119, 177620), (140, 150977), (166, 127330), (170, 124334), (214, 98770), (238, 88810), (332, 63665), (340, 62167), (415, 50932), (428, 49385), (476, 44405), (535, 39508), (581, 36380), (595, 35524), (749, 28220), (830, 25466), (1070, 19754), (1162, 18190), (1190, 17762), (1411, 14980), (1498, 14110), (1660, 12733), (1819, 11620), (2140, 9877), (2324, 9095), (2380, 8881), (2822, 7490), (2905, 7276), (2996, 7055), (3638, 5810), (3745, 5644)]