28781020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{761}}^1$

素因数の和:862

約数の個数: 48

約数和(自身を含む): 63495936

約数和(自身を除く): 34714916

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 761, 1220, 1522, 1891, 3044, 3782, 3805, 7564, 7610, 9455, 15220, 18910, 23591, 37820, 46421, 47182, 92842, 94364, 117955, 185684, 232105, 235910, 464210, 471820, 928420, 1439051, 2878102, 5756204, 7195255, 14390510, 28781020]

約数ペア:

[(1, 28781020), (2, 14390510), (4, 7195255), (5, 5756204), (10, 2878102), (20, 1439051), (31, 928420), (61, 471820), (62, 464210), (122, 235910), (124, 232105), (155, 185684), (244, 117955), (305, 94364), (310, 92842), (610, 47182), (620, 46421), (761, 37820), (1220, 23591), (1522, 18910), (1891, 15220), (3044, 9455), (3782, 7610), (3805, 7564)]