20918560

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:230

約数の個数: 96

約数和(自身を含む): 54295920

約数和(自身を除く): 33377360

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 89, 104, 113, 130, 160, 178, 208, 226, 260, 356, 416, 445, 452, 520, 565, 712, 890, 904, 1040, 1130, 1157, 1424, 1469, 1780, 1808, 2080, 2260, 2314, 2848, 2938, 3560, 3616, 4520, 4628, 5785, 5876, 7120, 7345, 9040, 9256, 10057, 11570, 11752, 14240, 14690, 18080, 18512, 20114, 23140, 23504, 29380, 37024, 40228, 46280, 47008, 50285, 58760, 80456, 92560, 100570, 117520, 130741, 160912, 185120, 201140, 235040, 261482, 321824, 402280, 522964, 653705, 804560, 1045928, 1307410, 1609120, 2091856, 2614820, 4183712, 5229640, 10459280, 20918560]

約数ペア:

[(1, 20918560), (2, 10459280), (4, 5229640), (5, 4183712), (8, 2614820), (10, 2091856), (13, 1609120), (16, 1307410), (20, 1045928), (26, 804560), (32, 653705), (40, 522964), (52, 402280), (65, 321824), (80, 261482), (89, 235040), (104, 201140), (113, 185120), (130, 160912), (160, 130741), (178, 117520), (208, 100570), (226, 92560), (260, 80456), (356, 58760), (416, 50285), (445, 47008), (452, 46280), (520, 40228), (565, 37024), (712, 29380), (890, 23504), (904, 23140), (1040, 20114), (1130, 18512), (1157, 18080), (1424, 14690), (1469, 14240), (1780, 11752), (1808, 11570), (2080, 10057), (2260, 9256), (2314, 9040), (2848, 7345), (2938, 7120), (3560, 5876), (3616, 5785), (4520, 4628)]