20727220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{331}}^1$

素因数の和:472

約数の個数: 48

約数和(自身を含む): 45513216

約数和(自身を除く): 24785996

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 101, 124, 155, 202, 310, 331, 404, 505, 620, 662, 1010, 1324, 1655, 2020, 3131, 3310, 6262, 6620, 10261, 12524, 15655, 20522, 31310, 33431, 41044, 51305, 62620, 66862, 102610, 133724, 167155, 205220, 334310, 668620, 1036361, 2072722, 4145444, 5181805, 10363610, 20727220]

約数ペア:

[(1, 20727220), (2, 10363610), (4, 5181805), (5, 4145444), (10, 2072722), (20, 1036361), (31, 668620), (62, 334310), (101, 205220), (124, 167155), (155, 133724), (202, 102610), (310, 66862), (331, 62620), (404, 51305), (505, 41044), (620, 33431), (662, 31310), (1010, 20522), (1324, 15655), (1655, 12524), (2020, 10261), (3131, 6620), (3310, 6262)]