81297320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1979}}^1$

素因数の和:2082

約数の個数: 64

約数和(自身を含む): 199584000

約数和(自身を除く): 118286680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 520, 632, 790, 1027, 1580, 1979, 2054, 3160, 3958, 4108, 5135, 7916, 8216, 9895, 10270, 15832, 19790, 20540, 25727, 39580, 41080, 51454, 79160, 102908, 128635, 156341, 205816, 257270, 312682, 514540, 625364, 781705, 1029080, 1250728, 1563410, 2032433, 3126820, 4064866, 6253640, 8129732, 10162165, 16259464, 20324330, 40648660, 81297320]

約数ペア:

[(1, 81297320), (2, 40648660), (4, 20324330), (5, 16259464), (8, 10162165), (10, 8129732), (13, 6253640), (20, 4064866), (26, 3126820), (40, 2032433), (52, 1563410), (65, 1250728), (79, 1029080), (104, 781705), (130, 625364), (158, 514540), (260, 312682), (316, 257270), (395, 205816), (520, 156341), (632, 128635), (790, 102908), (1027, 79160), (1580, 51454), (1979, 41080), (2054, 39580), (3160, 25727), (3958, 20540), (4108, 19790), (5135, 15832), (7916, 10270), (8216, 9895)]