21715460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^4$

素因数の和:90

約数の個数: 60

約数和(自身を含む): 52179708

約数和(自身を除く): 30464248

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 289, 340, 442, 578, 884, 1105, 1156, 1445, 2210, 2890, 3757, 4420, 4913, 5780, 7514, 9826, 15028, 18785, 19652, 24565, 37570, 49130, 63869, 75140, 83521, 98260, 127738, 167042, 255476, 319345, 334084, 417605, 638690, 835210, 1085773, 1277380, 1670420, 2171546, 4343092, 5428865, 10857730, 21715460]

約数ペア:

[(1, 21715460), (2, 10857730), (4, 5428865), (5, 4343092), (10, 2171546), (13, 1670420), (17, 1277380), (20, 1085773), (26, 835210), (34, 638690), (52, 417605), (65, 334084), (68, 319345), (85, 255476), (130, 167042), (170, 127738), (221, 98260), (260, 83521), (289, 75140), (340, 63869), (442, 49130), (578, 37570), (884, 24565), (1105, 19652), (1156, 18785), (1445, 15028), (2210, 9826), (2890, 7514), (3757, 5780), (4420, 4913)]