81981460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:241

約数の個数: 96

約数和(自身を含む): 195955200

約数和(自身を除く): 113973740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 53, 55, 79, 89, 106, 110, 158, 178, 212, 220, 265, 316, 356, 395, 445, 530, 583, 790, 869, 890, 979, 1060, 1166, 1580, 1738, 1780, 1958, 2332, 2915, 3476, 3916, 4187, 4345, 4717, 4895, 5830, 7031, 8374, 8690, 9434, 9790, 11660, 14062, 16748, 17380, 18868, 19580, 20935, 23585, 28124, 35155, 41870, 46057, 47170, 51887, 70310, 77341, 83740, 92114, 94340, 103774, 140620, 154682, 184228, 207548, 230285, 259435, 309364, 372643, 386705, 460570, 518870, 745286, 773410, 921140, 1037740, 1490572, 1546820, 1863215, 3726430, 4099073, 7452860, 8198146, 16396292, 20495365, 40990730, 81981460]

約数ペア:

[(1, 81981460), (2, 40990730), (4, 20495365), (5, 16396292), (10, 8198146), (11, 7452860), (20, 4099073), (22, 3726430), (44, 1863215), (53, 1546820), (55, 1490572), (79, 1037740), (89, 921140), (106, 773410), (110, 745286), (158, 518870), (178, 460570), (212, 386705), (220, 372643), (265, 309364), (316, 259435), (356, 230285), (395, 207548), (445, 184228), (530, 154682), (583, 140620), (790, 103774), (869, 94340), (890, 92114), (979, 83740), (1060, 77341), (1166, 70310), (1580, 51887), (1738, 47170), (1780, 46057), (1958, 41870), (2332, 35155), (2915, 28124), (3476, 23585), (3916, 20935), (4187, 19580), (4345, 18868), (4717, 17380), (4895, 16748), (5830, 14062), (7031, 11660), (8374, 9790), (8690, 9434)]