19993870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 41912640

約数和(自身を除く): 21918770

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 83, 85, 109, 130, 166, 170, 218, 221, 415, 442, 545, 830, 1079, 1090, 1105, 1411, 1417, 1853, 2158, 2210, 2822, 2834, 3706, 5395, 7055, 7085, 9047, 9265, 10790, 14110, 14170, 18094, 18343, 18530, 24089, 36686, 45235, 48178, 90470, 91715, 117611, 120445, 153799, 183430, 235222, 240890, 307598, 588055, 768995, 1176110, 1537990, 1999387, 3998774, 9996935, 19993870]

約数ペア:

[(1, 19993870), (2, 9996935), (5, 3998774), (10, 1999387), (13, 1537990), (17, 1176110), (26, 768995), (34, 588055), (65, 307598), (83, 240890), (85, 235222), (109, 183430), (130, 153799), (166, 120445), (170, 117611), (218, 91715), (221, 90470), (415, 48178), (442, 45235), (545, 36686), (830, 24089), (1079, 18530), (1090, 18343), (1105, 18094), (1411, 14170), (1417, 14110), (1853, 10790), (2158, 9265), (2210, 9047), (2822, 7085), (2834, 7055), (3706, 5395)]