640525390

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1\times {\mathrm{18443}}^1$

素因数の和:18624

約数の個数: 32

約数和(自身を含む): 1211106816

約数和(自身を除く): 570581426

約数列:

[1, 2, 5, 10, 23, 46, 115, 151, 230, 302, 755, 1510, 3473, 6946, 17365, 18443, 34730, 36886, 92215, 184430, 424189, 848378, 2120945, 2784893, 4241890, 5569786, 13924465, 27848930, 64052539, 128105078, 320262695, 640525390]

約数ペア:

[(1, 640525390), (2, 320262695), (5, 128105078), (10, 64052539), (23, 27848930), (46, 13924465), (115, 5569786), (151, 4241890), (230, 2784893), (302, 2120945), (755, 848378), (1510, 424189), (3473, 184430), (6946, 92215), (17365, 36886), (18443, 34730)]