128509880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{2801}}^1$

素因数の和:2880

約数の個数: 64

約数和(自身を含む): 306650880

約数和(自身を除く): 178141000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 620, 740, 1147, 1240, 1480, 2294, 2801, 4588, 5602, 5735, 9176, 11204, 11470, 14005, 22408, 22940, 28010, 45880, 56020, 86831, 103637, 112040, 173662, 207274, 347324, 414548, 434155, 518185, 694648, 829096, 868310, 1036370, 1736620, 2072740, 3212747, 3473240, 4145480, 6425494, 12850988, 16063735, 25701976, 32127470, 64254940, 128509880]

約数ペア:

[(1, 128509880), (2, 64254940), (4, 32127470), (5, 25701976), (8, 16063735), (10, 12850988), (20, 6425494), (31, 4145480), (37, 3473240), (40, 3212747), (62, 2072740), (74, 1736620), (124, 1036370), (148, 868310), (155, 829096), (185, 694648), (248, 518185), (296, 434155), (310, 414548), (370, 347324), (620, 207274), (740, 173662), (1147, 112040), (1240, 103637), (1480, 86831), (2294, 56020), (2801, 45880), (4588, 28010), (5602, 22940), (5735, 22408), (9176, 14005), (11204, 11470)]