81869450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:312

約数の個数: 96

約数和(自身を含む): 179988480

約数和(自身を除く): 98119030

約数列:

[1, 2, 5, 10, 13, 17, 25, 26, 31, 34, 50, 62, 65, 85, 130, 155, 170, 221, 239, 310, 325, 403, 425, 442, 478, 527, 650, 775, 806, 850, 1054, 1105, 1195, 1550, 2015, 2210, 2390, 2635, 3107, 4030, 4063, 5270, 5525, 5975, 6214, 6851, 7409, 8126, 10075, 11050, 11950, 13175, 13702, 14818, 15535, 20150, 20315, 26350, 31070, 34255, 37045, 40630, 52819, 68510, 74090, 77675, 96317, 101575, 105638, 125953, 155350, 171275, 185225, 192634, 203150, 251906, 264095, 342550, 370450, 481585, 528190, 629765, 963170, 1259530, 1320475, 1637389, 2407925, 2640950, 3148825, 3274778, 4815850, 6297650, 8186945, 16373890, 40934725, 81869450]

約数ペア:

[(1, 81869450), (2, 40934725), (5, 16373890), (10, 8186945), (13, 6297650), (17, 4815850), (25, 3274778), (26, 3148825), (31, 2640950), (34, 2407925), (50, 1637389), (62, 1320475), (65, 1259530), (85, 963170), (130, 629765), (155, 528190), (170, 481585), (221, 370450), (239, 342550), (310, 264095), (325, 251906), (403, 203150), (425, 192634), (442, 185225), (478, 171275), (527, 155350), (650, 125953), (775, 105638), (806, 101575), (850, 96317), (1054, 77675), (1105, 74090), (1195, 68510), (1550, 52819), (2015, 40630), (2210, 37045), (2390, 34255), (2635, 31070), (3107, 26350), (4030, 20315), (4063, 20150), (5270, 15535), (5525, 14818), (5975, 13702), (6214, 13175), (6851, 11950), (7409, 11050), (8126, 10075)]