20628640

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4159}}^1$

素因数の和:4205

約数の個数: 48

約数和(自身を含む): 50319360

約数和(自身を除く): 29690720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4159, 4960, 8318, 16636, 20795, 33272, 41590, 66544, 83180, 128929, 133088, 166360, 257858, 332720, 515716, 644645, 665440, 1031432, 1289290, 2062864, 2578580, 4125728, 5157160, 10314320, 20628640]

約数ペア:

[(1, 20628640), (2, 10314320), (4, 5157160), (5, 4125728), (8, 2578580), (10, 2062864), (16, 1289290), (20, 1031432), (31, 665440), (32, 644645), (40, 515716), (62, 332720), (80, 257858), (124, 166360), (155, 133088), (160, 128929), (248, 83180), (310, 66544), (496, 41590), (620, 33272), (992, 20795), (1240, 16636), (2480, 8318), (4159, 4960)]