21611650

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 42283008

約数和(自身を除く): 20671358

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 73, 146, 155, 191, 310, 365, 382, 730, 775, 955, 1550, 1825, 1910, 2263, 3650, 4526, 4775, 5921, 9550, 11315, 11842, 13943, 22630, 27886, 29605, 56575, 59210, 69715, 113150, 139430, 148025, 296050, 348575, 432233, 697150, 864466, 2161165, 4322330, 10805825, 21611650]

約数ペア:

[(1, 21611650), (2, 10805825), (5, 4322330), (10, 2161165), (25, 864466), (31, 697150), (50, 432233), (62, 348575), (73, 296050), (146, 148025), (155, 139430), (191, 113150), (310, 69715), (365, 59210), (382, 56575), (730, 29605), (775, 27886), (955, 22630), (1550, 13943), (1825, 11842), (1910, 11315), (2263, 9550), (3650, 5921), (4526, 4775)]