19906960

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1$

素因数の和:416

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 30089840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 40, 46, 62, 80, 92, 115, 124, 155, 184, 230, 248, 310, 349, 368, 460, 496, 620, 698, 713, 920, 1240, 1396, 1426, 1745, 1840, 2480, 2792, 2852, 3490, 3565, 5584, 5704, 6980, 7130, 8027, 10819, 11408, 13960, 14260, 16054, 21638, 27920, 28520, 32108, 40135, 43276, 54095, 57040, 64216, 80270, 86552, 108190, 128432, 160540, 173104, 216380, 248837, 321080, 432760, 497674, 642160, 865520, 995348, 1244185, 1990696, 2488370, 3981392, 4976740, 9953480, 19906960]

約数ペア:

[(1, 19906960), (2, 9953480), (4, 4976740), (5, 3981392), (8, 2488370), (10, 1990696), (16, 1244185), (20, 995348), (23, 865520), (31, 642160), (40, 497674), (46, 432760), (62, 321080), (80, 248837), (92, 216380), (115, 173104), (124, 160540), (155, 128432), (184, 108190), (230, 86552), (248, 80270), (310, 64216), (349, 57040), (368, 54095), (460, 43276), (496, 40135), (620, 32108), (698, 28520), (713, 27920), (920, 21638), (1240, 16054), (1396, 14260), (1426, 13960), (1745, 11408), (1840, 10819), (2480, 8027), (2792, 7130), (2852, 6980), (3490, 5704), (3565, 5584)]