19878100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1063}}^1$

素因数の和:1105

約数の個数: 72

約数和(自身を含む): 49871808

約数和(自身を除く): 29993708

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 25, 34, 44, 50, 55, 68, 85, 100, 110, 170, 187, 220, 275, 340, 374, 425, 550, 748, 850, 935, 1063, 1100, 1700, 1870, 2126, 3740, 4252, 4675, 5315, 9350, 10630, 11693, 18071, 18700, 21260, 23386, 26575, 36142, 46772, 53150, 58465, 72284, 90355, 106300, 116930, 180710, 198781, 233860, 292325, 361420, 397562, 451775, 584650, 795124, 903550, 993905, 1169300, 1807100, 1987810, 3975620, 4969525, 9939050, 19878100]

約数ペア:

[(1, 19878100), (2, 9939050), (4, 4969525), (5, 3975620), (10, 1987810), (11, 1807100), (17, 1169300), (20, 993905), (22, 903550), (25, 795124), (34, 584650), (44, 451775), (50, 397562), (55, 361420), (68, 292325), (85, 233860), (100, 198781), (110, 180710), (170, 116930), (187, 106300), (220, 90355), (275, 72284), (340, 58465), (374, 53150), (425, 46772), (550, 36142), (748, 26575), (850, 23386), (935, 21260), (1063, 18700), (1100, 18071), (1700, 11693), (1870, 10630), (2126, 9350), (3740, 5315), (4252, 4675)]