21784490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{647}}^1$

素因数の和:711

約数の個数: 64

約数和(自身を含む): 49641984

約数和(自身を除く): 27857494

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 37, 65, 70, 74, 91, 130, 182, 185, 259, 370, 455, 481, 518, 647, 910, 962, 1294, 1295, 2405, 2590, 3235, 3367, 4529, 4810, 6470, 6734, 8411, 9058, 16822, 16835, 22645, 23939, 33670, 42055, 45290, 47878, 58877, 84110, 117754, 119695, 167573, 239390, 294385, 311207, 335146, 588770, 622414, 837865, 1556035, 1675730, 2178449, 3112070, 4356898, 10892245, 21784490]

約数ペア:

[(1, 21784490), (2, 10892245), (5, 4356898), (7, 3112070), (10, 2178449), (13, 1675730), (14, 1556035), (26, 837865), (35, 622414), (37, 588770), (65, 335146), (70, 311207), (74, 294385), (91, 239390), (130, 167573), (182, 119695), (185, 117754), (259, 84110), (370, 58877), (455, 47878), (481, 45290), (518, 42055), (647, 33670), (910, 23939), (962, 22645), (1294, 16835), (1295, 16822), (2405, 9058), (2590, 8411), (3235, 6734), (3367, 6470), (4529, 4810)]