20786920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{397}}^1$

素因数の和:443

約数の個数: 128

約数和(自身を含む): 61896960

約数和(自身を除く): 41110040

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 17, 20, 22, 28, 34, 35, 40, 44, 55, 56, 68, 70, 77, 85, 88, 110, 119, 136, 140, 154, 170, 187, 220, 238, 280, 308, 340, 374, 385, 397, 440, 476, 595, 616, 680, 748, 770, 794, 935, 952, 1190, 1309, 1496, 1540, 1588, 1870, 1985, 2380, 2618, 2779, 3080, 3176, 3740, 3970, 4367, 4760, 5236, 5558, 6545, 6749, 7480, 7940, 8734, 10472, 11116, 13090, 13498, 13895, 15880, 17468, 21835, 22232, 26180, 26996, 27790, 30569, 33745, 34936, 43670, 47243, 52360, 53992, 55580, 61138, 67490, 74239, 87340, 94486, 111160, 122276, 134980, 148478, 152845, 174680, 188972, 236215, 244552, 269960, 296956, 305690, 371195, 377944, 472430, 519673, 593912, 611380, 742390, 944860, 1039346, 1222760, 1484780, 1889720, 2078692, 2598365, 2969560, 4157384, 5196730, 10393460, 20786920]

約数ペア:

[(1, 20786920), (2, 10393460), (4, 5196730), (5, 4157384), (7, 2969560), (8, 2598365), (10, 2078692), (11, 1889720), (14, 1484780), (17, 1222760), (20, 1039346), (22, 944860), (28, 742390), (34, 611380), (35, 593912), (40, 519673), (44, 472430), (55, 377944), (56, 371195), (68, 305690), (70, 296956), (77, 269960), (85, 244552), (88, 236215), (110, 188972), (119, 174680), (136, 152845), (140, 148478), (154, 134980), (170, 122276), (187, 111160), (220, 94486), (238, 87340), (280, 74239), (308, 67490), (340, 61138), (374, 55580), (385, 53992), (397, 52360), (440, 47243), (476, 43670), (595, 34936), (616, 33745), (680, 30569), (748, 27790), (770, 26996), (794, 26180), (935, 22232), (952, 21835), (1190, 17468), (1309, 15880), (1496, 13895), (1540, 13498), (1588, 13090), (1870, 11116), (1985, 10472), (2380, 8734), (2618, 7940), (2779, 7480), (3080, 6749), (3176, 6545), (3740, 5558), (3970, 5236), (4367, 4760)]