19720480

素因数分解:

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

素因数の和:546

約数の個数: 96

約数和(自身を含む): 52920000

約数和(自身を除く): 33199520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 499, 520, 608, 760, 988, 998, 1040, 1235, 1520, 1976, 1996, 2080, 2470, 2495, 3040, 3952, 3992, 4940, 4990, 6487, 7904, 7984, 9481, 9880, 9980, 12974, 15968, 18962, 19760, 19960, 25948, 32435, 37924, 39520, 39920, 47405, 51896, 64870, 75848, 79840, 94810, 103792, 123253, 129740, 151696, 189620, 207584, 246506, 259480, 303392, 379240, 493012, 518960, 616265, 758480, 986024, 1037920, 1232530, 1516960, 1972048, 2465060, 3944096, 4930120, 9860240, 19720480]

約数ペア:

[(1, 19720480), (2, 9860240), (4, 4930120), (5, 3944096), (8, 2465060), (10, 1972048), (13, 1516960), (16, 1232530), (19, 1037920), (20, 986024), (26, 758480), (32, 616265), (38, 518960), (40, 493012), (52, 379240), (65, 303392), (76, 259480), (80, 246506), (95, 207584), (104, 189620), (130, 151696), (152, 129740), (160, 123253), (190, 103792), (208, 94810), (247, 79840), (260, 75848), (304, 64870), (380, 51896), (416, 47405), (494, 39920), (499, 39520), (520, 37924), (608, 32435), (760, 25948), (988, 19960), (998, 19760), (1040, 18962), (1235, 15968), (1520, 12974), (1976, 9980), (1996, 9880), (2080, 9481), (2470, 7984), (2495, 7904), (3040, 6487), (3952, 4990), (3992, 4940)]