31515560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 73846080

約数和(自身を除く): 42330520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 73, 86, 146, 172, 215, 251, 292, 344, 365, 430, 502, 584, 730, 860, 1004, 1255, 1460, 1720, 2008, 2510, 2920, 3139, 5020, 6278, 10040, 10793, 12556, 15695, 18323, 21586, 25112, 31390, 36646, 43172, 53965, 62780, 73292, 86344, 91615, 107930, 125560, 146584, 183230, 215860, 366460, 431720, 732920, 787889, 1575778, 3151556, 3939445, 6303112, 7878890, 15757780, 31515560]

約数ペア:

[(1, 31515560), (2, 15757780), (4, 7878890), (5, 6303112), (8, 3939445), (10, 3151556), (20, 1575778), (40, 787889), (43, 732920), (73, 431720), (86, 366460), (146, 215860), (172, 183230), (215, 146584), (251, 125560), (292, 107930), (344, 91615), (365, 86344), (430, 73292), (502, 62780), (584, 53965), (730, 43172), (860, 36646), (1004, 31390), (1255, 25112), (1460, 21586), (1720, 18323), (2008, 15695), (2510, 12556), (2920, 10793), (3139, 10040), (5020, 6278)]