21501920

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:688

約数の個数: 96

約数和(自身を含む): 58423680

約数和(自身を除く): 36921760

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 32, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 160, 176, 190, 209, 220, 304, 352, 380, 418, 440, 608, 643, 760, 836, 880, 1045, 1286, 1520, 1672, 1760, 2090, 2572, 3040, 3215, 3344, 4180, 5144, 6430, 6688, 7073, 8360, 10288, 12217, 12860, 14146, 16720, 20576, 24434, 25720, 28292, 33440, 35365, 48868, 51440, 56584, 61085, 70730, 97736, 102880, 113168, 122170, 134387, 141460, 195472, 226336, 244340, 268774, 282920, 390944, 488680, 537548, 565840, 671935, 977360, 1075096, 1131680, 1343870, 1954720, 2150192, 2687740, 4300384, 5375480, 10750960, 21501920]

約数ペア:

[(1, 21501920), (2, 10750960), (4, 5375480), (5, 4300384), (8, 2687740), (10, 2150192), (11, 1954720), (16, 1343870), (19, 1131680), (20, 1075096), (22, 977360), (32, 671935), (38, 565840), (40, 537548), (44, 488680), (55, 390944), (76, 282920), (80, 268774), (88, 244340), (95, 226336), (110, 195472), (152, 141460), (160, 134387), (176, 122170), (190, 113168), (209, 102880), (220, 97736), (304, 70730), (352, 61085), (380, 56584), (418, 51440), (440, 48868), (608, 35365), (643, 33440), (760, 28292), (836, 25720), (880, 24434), (1045, 20576), (1286, 16720), (1520, 14146), (1672, 12860), (1760, 12217), (2090, 10288), (2572, 8360), (3040, 7073), (3215, 6688), (3344, 6430), (4180, 5144)]