20857540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{839}}^1$

素因数の和:972

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 27405500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 113, 220, 226, 452, 565, 839, 1130, 1243, 1678, 2260, 2486, 3356, 4195, 4972, 6215, 8390, 9229, 12430, 16780, 18458, 24860, 36916, 46145, 92290, 94807, 184580, 189614, 379228, 474035, 948070, 1042877, 1896140, 2085754, 4171508, 5214385, 10428770, 20857540]

約数ペア:

[(1, 20857540), (2, 10428770), (4, 5214385), (5, 4171508), (10, 2085754), (11, 1896140), (20, 1042877), (22, 948070), (44, 474035), (55, 379228), (110, 189614), (113, 184580), (220, 94807), (226, 92290), (452, 46145), (565, 36916), (839, 24860), (1130, 18458), (1243, 16780), (1678, 12430), (2260, 9229), (2486, 8390), (3356, 6215), (4195, 4972)]