19989700

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 46012680

約数和(自身を除く): 26022980

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 61, 100, 113, 116, 122, 145, 226, 244, 290, 305, 452, 565, 580, 610, 725, 1130, 1220, 1450, 1525, 1769, 2260, 2825, 2900, 3050, 3277, 3538, 5650, 6100, 6554, 6893, 7076, 8845, 11300, 13108, 13786, 16385, 17690, 27572, 32770, 34465, 35380, 44225, 65540, 68930, 81925, 88450, 137860, 163850, 172325, 176900, 199897, 327700, 344650, 399794, 689300, 799588, 999485, 1998970, 3997940, 4997425, 9994850, 19989700]

約数ペア:

[(1, 19989700), (2, 9994850), (4, 4997425), (5, 3997940), (10, 1998970), (20, 999485), (25, 799588), (29, 689300), (50, 399794), (58, 344650), (61, 327700), (100, 199897), (113, 176900), (116, 172325), (122, 163850), (145, 137860), (226, 88450), (244, 81925), (290, 68930), (305, 65540), (452, 44225), (565, 35380), (580, 34465), (610, 32770), (725, 27572), (1130, 17690), (1220, 16385), (1450, 13786), (1525, 13108), (1769, 11300), (2260, 8845), (2825, 7076), (2900, 6893), (3050, 6554), (3277, 6100), (3538, 5650)]