20555220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{449}}^1$

素因数の和:577

約数の個数: 96

約数和(自身を含む): 66528000

約数和(自身を除く): 45972780

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 109, 140, 210, 218, 327, 420, 436, 449, 545, 654, 763, 898, 1090, 1308, 1347, 1526, 1635, 1796, 2180, 2245, 2289, 2694, 3052, 3143, 3270, 3815, 4490, 4578, 5388, 6286, 6540, 6735, 7630, 8980, 9156, 9429, 11445, 12572, 13470, 15260, 15715, 18858, 22890, 26940, 31430, 37716, 45780, 47145, 48941, 62860, 94290, 97882, 146823, 188580, 195764, 244705, 293646, 342587, 489410, 587292, 685174, 734115, 978820, 1027761, 1370348, 1468230, 1712935, 2055522, 2936460, 3425870, 4111044, 5138805, 6851740, 10277610, 20555220]

約数ペア:

[(1, 20555220), (2, 10277610), (3, 6851740), (4, 5138805), (5, 4111044), (6, 3425870), (7, 2936460), (10, 2055522), (12, 1712935), (14, 1468230), (15, 1370348), (20, 1027761), (21, 978820), (28, 734115), (30, 685174), (35, 587292), (42, 489410), (60, 342587), (70, 293646), (84, 244705), (105, 195764), (109, 188580), (140, 146823), (210, 97882), (218, 94290), (327, 62860), (420, 48941), (436, 47145), (449, 45780), (545, 37716), (654, 31430), (763, 26940), (898, 22890), (1090, 18858), (1308, 15715), (1347, 15260), (1526, 13470), (1635, 12572), (1796, 11445), (2180, 9429), (2245, 9156), (2289, 8980), (2694, 7630), (3052, 6735), (3143, 6540), (3270, 6286), (3815, 5388), (4490, 4578)]