78881920

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:550

約数の個数: 128

約数和(自身を含む): 214200000

約数和(自身を除く): 135318080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 128, 130, 152, 160, 190, 208, 247, 260, 304, 320, 380, 416, 494, 499, 520, 608, 640, 760, 832, 988, 998, 1040, 1216, 1235, 1520, 1664, 1976, 1996, 2080, 2432, 2470, 2495, 3040, 3952, 3992, 4160, 4940, 4990, 6080, 6487, 7904, 7984, 8320, 9481, 9880, 9980, 12160, 12974, 15808, 15968, 18962, 19760, 19960, 25948, 31616, 31936, 32435, 37924, 39520, 39920, 47405, 51896, 63872, 64870, 75848, 79040, 79840, 94810, 103792, 123253, 129740, 151696, 158080, 159680, 189620, 207584, 246506, 259480, 303392, 319360, 379240, 415168, 493012, 518960, 606784, 616265, 758480, 830336, 986024, 1037920, 1213568, 1232530, 1516960, 1972048, 2075840, 2465060, 3033920, 3944096, 4151680, 4930120, 6067840, 7888192, 9860240, 15776384, 19720480, 39440960, 78881920]

約数ペア:

[(1, 78881920), (2, 39440960), (4, 19720480), (5, 15776384), (8, 9860240), (10, 7888192), (13, 6067840), (16, 4930120), (19, 4151680), (20, 3944096), (26, 3033920), (32, 2465060), (38, 2075840), (40, 1972048), (52, 1516960), (64, 1232530), (65, 1213568), (76, 1037920), (80, 986024), (95, 830336), (104, 758480), (128, 616265), (130, 606784), (152, 518960), (160, 493012), (190, 415168), (208, 379240), (247, 319360), (260, 303392), (304, 259480), (320, 246506), (380, 207584), (416, 189620), (494, 159680), (499, 158080), (520, 151696), (608, 129740), (640, 123253), (760, 103792), (832, 94810), (988, 79840), (998, 79040), (1040, 75848), (1216, 64870), (1235, 63872), (1520, 51896), (1664, 47405), (1976, 39920), (1996, 39520), (2080, 37924), (2432, 32435), (2470, 31936), (2495, 31616), (3040, 25948), (3952, 19960), (3992, 19760), (4160, 18962), (4940, 15968), (4990, 15808), (6080, 12974), (6487, 12160), (7904, 9980), (7984, 9880), (8320, 9481)]