19940440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1237}}^1$

素因数の和:1292

約数の個数: 64

約数和(自身を含む): 49916160

約数和(自身を除く): 29975720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1237, 1240, 1612, 2015, 2474, 3224, 4030, 4948, 6185, 8060, 9896, 12370, 16081, 16120, 24740, 32162, 38347, 49480, 64324, 76694, 80405, 128648, 153388, 160810, 191735, 306776, 321620, 383470, 498511, 643240, 766940, 997022, 1533880, 1994044, 2492555, 3988088, 4985110, 9970220, 19940440]

約数ペア:

[(1, 19940440), (2, 9970220), (4, 4985110), (5, 3988088), (8, 2492555), (10, 1994044), (13, 1533880), (20, 997022), (26, 766940), (31, 643240), (40, 498511), (52, 383470), (62, 321620), (65, 306776), (104, 191735), (124, 160810), (130, 153388), (155, 128648), (248, 80405), (260, 76694), (310, 64324), (403, 49480), (520, 38347), (620, 32162), (806, 24740), (1237, 16120), (1240, 16081), (1612, 12370), (2015, 9896), (2474, 8060), (3224, 6185), (4030, 4948)]