21205580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{853}}^1$

素因数の和:986

約数の個数: 48

約数和(自身を含む): 49067424

約数和(自身を除く): 27861844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 113, 220, 226, 452, 565, 853, 1130, 1243, 1706, 2260, 2486, 3412, 4265, 4972, 6215, 8530, 9383, 12430, 17060, 18766, 24860, 37532, 46915, 93830, 96389, 187660, 192778, 385556, 481945, 963890, 1060279, 1927780, 2120558, 4241116, 5301395, 10602790, 21205580]

約数ペア:

[(1, 21205580), (2, 10602790), (4, 5301395), (5, 4241116), (10, 2120558), (11, 1927780), (20, 1060279), (22, 963890), (44, 481945), (55, 385556), (110, 192778), (113, 187660), (220, 96389), (226, 93830), (452, 46915), (565, 37532), (853, 24860), (1130, 18766), (1243, 17060), (1706, 12430), (2260, 9383), (2486, 8530), (3412, 6215), (4265, 4972)]