21419840

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1$

素因数の和:320

約数の個数: 112

約数和(自身を含む): 58033920

約数和(自身を除く): 36614080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 271, 304, 320, 380, 416, 494, 520, 542, 608, 760, 832, 988, 1040, 1084, 1216, 1235, 1355, 1520, 1976, 2080, 2168, 2470, 2710, 3040, 3523, 3952, 4160, 4336, 4940, 5149, 5420, 6080, 7046, 7904, 8672, 9880, 10298, 10840, 14092, 15808, 17344, 17615, 19760, 20596, 21680, 25745, 28184, 35230, 39520, 41192, 43360, 51490, 56368, 66937, 70460, 79040, 82384, 86720, 102980, 112736, 133874, 140920, 164768, 205960, 225472, 267748, 281840, 329536, 334685, 411920, 535496, 563680, 669370, 823840, 1070992, 1127360, 1338740, 1647680, 2141984, 2677480, 4283968, 5354960, 10709920, 21419840]

約数ペア:

[(1, 21419840), (2, 10709920), (4, 5354960), (5, 4283968), (8, 2677480), (10, 2141984), (13, 1647680), (16, 1338740), (19, 1127360), (20, 1070992), (26, 823840), (32, 669370), (38, 563680), (40, 535496), (52, 411920), (64, 334685), (65, 329536), (76, 281840), (80, 267748), (95, 225472), (104, 205960), (130, 164768), (152, 140920), (160, 133874), (190, 112736), (208, 102980), (247, 86720), (260, 82384), (271, 79040), (304, 70460), (320, 66937), (380, 56368), (416, 51490), (494, 43360), (520, 41192), (542, 39520), (608, 35230), (760, 28184), (832, 25745), (988, 21680), (1040, 20596), (1084, 19760), (1216, 17615), (1235, 17344), (1355, 15808), (1520, 14092), (1976, 10840), (2080, 10298), (2168, 9880), (2470, 8672), (2710, 7904), (3040, 7046), (3523, 6080), (3952, 5420), (4160, 5149), (4336, 4940)]