20856680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2111}}^1$

素因数の和:2154

約数の個数: 64

約数和(自身を含む): 53222400

約数和(自身を除く): 32365720

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2111, 2470, 4222, 4940, 8444, 9880, 10555, 16888, 21110, 27443, 40109, 42220, 54886, 80218, 84440, 109772, 137215, 160436, 200545, 219544, 274430, 320872, 401090, 521417, 548860, 802180, 1042834, 1097720, 1604360, 2085668, 2607085, 4171336, 5214170, 10428340, 20856680]

約数ペア:

[(1, 20856680), (2, 10428340), (4, 5214170), (5, 4171336), (8, 2607085), (10, 2085668), (13, 1604360), (19, 1097720), (20, 1042834), (26, 802180), (38, 548860), (40, 521417), (52, 401090), (65, 320872), (76, 274430), (95, 219544), (104, 200545), (130, 160436), (152, 137215), (190, 109772), (247, 84440), (260, 80218), (380, 54886), (494, 42220), (520, 40109), (760, 27443), (988, 21110), (1235, 16888), (1976, 10555), (2111, 9880), (2470, 8444), (4222, 4940)]