21149920

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:284

約数の個数: 96

約数和(自身を含む): 55683936

約数和(自身を除く): 34534016

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 61, 80, 88, 110, 122, 160, 176, 197, 220, 244, 305, 352, 394, 440, 488, 610, 671, 788, 880, 976, 985, 1220, 1342, 1576, 1760, 1952, 1970, 2167, 2440, 2684, 3152, 3355, 3940, 4334, 4880, 5368, 6304, 6710, 7880, 8668, 9760, 10736, 10835, 12017, 13420, 15760, 17336, 21472, 21670, 24034, 26840, 31520, 34672, 43340, 48068, 53680, 60085, 69344, 86680, 96136, 107360, 120170, 132187, 173360, 192272, 240340, 264374, 346720, 384544, 480680, 528748, 660935, 961360, 1057496, 1321870, 1922720, 2114992, 2643740, 4229984, 5287480, 10574960, 21149920]

約数ペア:

[(1, 21149920), (2, 10574960), (4, 5287480), (5, 4229984), (8, 2643740), (10, 2114992), (11, 1922720), (16, 1321870), (20, 1057496), (22, 961360), (32, 660935), (40, 528748), (44, 480680), (55, 384544), (61, 346720), (80, 264374), (88, 240340), (110, 192272), (122, 173360), (160, 132187), (176, 120170), (197, 107360), (220, 96136), (244, 86680), (305, 69344), (352, 60085), (394, 53680), (440, 48068), (488, 43340), (610, 34672), (671, 31520), (788, 26840), (880, 24034), (976, 21670), (985, 21472), (1220, 17336), (1342, 15760), (1576, 13420), (1760, 12017), (1952, 10835), (1970, 10736), (2167, 9760), (2440, 8668), (2684, 7880), (3152, 6710), (3355, 6304), (3940, 5368), (4334, 4880)]