21000983968

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1\times {\mathrm{769}}^1$

素因数の和:1134

約数の個数: 96

約数和(自身を含む): 43030310400

約数和(自身を除く): 22029326432

約数列:

[1, 2, 4, 8, 16, 32, 43, 86, 89, 172, 178, 223, 344, 356, 446, 688, 712, 769, 892, 1376, 1424, 1538, 1784, 2848, 3076, 3568, 3827, 6152, 7136, 7654, 9589, 12304, 15308, 19178, 19847, 24608, 30616, 33067, 38356, 39694, 61232, 66134, 68441, 76712, 79388, 122464, 132268, 136882, 153424, 158776, 171487, 264536, 273764, 306848, 317552, 342974, 529072, 547528, 635104, 685948, 853421, 1058144, 1095056, 1371896, 1706842, 2190112, 2743792, 2942963, 3413684, 5487584, 5885926, 6827368, 7373941, 11771852, 13654736, 14747882, 15262343, 23543704, 27309472, 29495764, 30524686, 47087408, 58991528, 61049372, 94174816, 117983056, 122098744, 235966112, 244197488, 488394976, 656280749, 1312561498, 2625122996, 5250245992, 10500491984, 21000983968]

約数ペア:

[(1, 21000983968), (2, 10500491984), (4, 5250245992), (8, 2625122996), (16, 1312561498), (32, 656280749), (43, 488394976), (86, 244197488), (89, 235966112), (172, 122098744), (178, 117983056), (223, 94174816), (344, 61049372), (356, 58991528), (446, 47087408), (688, 30524686), (712, 29495764), (769, 27309472), (892, 23543704), (1376, 15262343), (1424, 14747882), (1538, 13654736), (1784, 11771852), (2848, 7373941), (3076, 6827368), (3568, 5885926), (3827, 5487584), (6152, 3413684), (7136, 2942963), (7654, 2743792), (9589, 2190112), (12304, 1706842), (15308, 1371896), (19178, 1095056), (19847, 1058144), (24608, 853421), (30616, 685948), (33067, 635104), (38356, 547528), (39694, 529072), (61232, 342974), (66134, 317552), (68441, 306848), (76712, 273764), (79388, 264536), (122464, 171487), (132268, 158776), (136882, 153424)]