20921888

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2647}}^1$

素因数の和:2689

約数の個数: 48

約数和(自身を含む): 46710720

約数和(自身を除く): 25788832

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 76, 104, 152, 208, 247, 304, 416, 494, 608, 988, 1976, 2647, 3952, 5294, 7904, 10588, 21176, 34411, 42352, 50293, 68822, 84704, 100586, 137644, 201172, 275288, 402344, 550576, 653809, 804688, 1101152, 1307618, 1609376, 2615236, 5230472, 10460944, 20921888]

約数ペア:

[(1, 20921888), (2, 10460944), (4, 5230472), (8, 2615236), (13, 1609376), (16, 1307618), (19, 1101152), (26, 804688), (32, 653809), (38, 550576), (52, 402344), (76, 275288), (104, 201172), (152, 137644), (208, 100586), (247, 84704), (304, 68822), (416, 50293), (494, 42352), (608, 34411), (988, 21176), (1976, 10588), (2647, 7904), (3952, 5294)]