19721120

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^2\times {\mathrm{233}}^1$

素因数の和:294

約数の個数: 72

約数和(自身を含む): 48913956

約数和(自身を除く): 29192836

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 233, 368, 460, 466, 529, 736, 920, 932, 1058, 1165, 1840, 1864, 2116, 2330, 2645, 3680, 3728, 4232, 4660, 5290, 5359, 7456, 8464, 9320, 10580, 10718, 16928, 18640, 21160, 21436, 26795, 37280, 42320, 42872, 53590, 84640, 85744, 107180, 123257, 171488, 214360, 246514, 428720, 493028, 616285, 857440, 986056, 1232570, 1972112, 2465140, 3944224, 4930280, 9860560, 19721120]

約数ペア:

[(1, 19721120), (2, 9860560), (4, 4930280), (5, 3944224), (8, 2465140), (10, 1972112), (16, 1232570), (20, 986056), (23, 857440), (32, 616285), (40, 493028), (46, 428720), (80, 246514), (92, 214360), (115, 171488), (160, 123257), (184, 107180), (230, 85744), (233, 84640), (368, 53590), (460, 42872), (466, 42320), (529, 37280), (736, 26795), (920, 21436), (932, 21160), (1058, 18640), (1165, 16928), (1840, 10718), (1864, 10580), (2116, 9320), (2330, 8464), (2645, 7456), (3680, 5359), (3728, 5290), (4232, 4660)]