20165175

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 39171600

約数和(自身を除く): 19006425

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 53, 57, 75, 89, 95, 159, 171, 225, 265, 267, 285, 445, 475, 477, 795, 801, 855, 1007, 1325, 1335, 1425, 1691, 2225, 2385, 3021, 3975, 4005, 4275, 4717, 5035, 5073, 6675, 8455, 9063, 11925, 14151, 15105, 15219, 20025, 23585, 25175, 25365, 42275, 42453, 45315, 70755, 75525, 76095, 89623, 117925, 126825, 212265, 226575, 268869, 353775, 380475, 448115, 806607, 1061325, 1344345, 2240575, 4033035, 6721725, 20165175]

約数ペア:

[(1, 20165175), (3, 6721725), (5, 4033035), (9, 2240575), (15, 1344345), (19, 1061325), (25, 806607), (45, 448115), (53, 380475), (57, 353775), (75, 268869), (89, 226575), (95, 212265), (159, 126825), (171, 117925), (225, 89623), (265, 76095), (267, 75525), (285, 70755), (445, 45315), (475, 42453), (477, 42275), (795, 25365), (801, 25175), (855, 23585), (1007, 20025), (1325, 15219), (1335, 15105), (1425, 14151), (1691, 11925), (2225, 9063), (2385, 8455), (3021, 6675), (3975, 5073), (4005, 5035), (4275, 4717)]