21011320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^2$

素因数の和:145

約数の個数: 96

約数和(自身を含む): 55656720

約数和(自身を除く): 34645400

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 53, 55, 68, 85, 88, 106, 110, 136, 170, 187, 212, 220, 265, 340, 374, 424, 440, 530, 583, 680, 748, 901, 935, 1060, 1166, 1496, 1802, 1870, 2120, 2332, 2809, 2915, 3604, 3740, 4505, 4664, 5618, 5830, 7208, 7480, 9010, 9911, 11236, 11660, 14045, 18020, 19822, 22472, 23320, 28090, 30899, 36040, 39644, 47753, 49555, 56180, 61798, 79288, 95506, 99110, 112360, 123596, 154495, 191012, 198220, 238765, 247192, 308990, 382024, 396440, 477530, 525283, 617980, 955060, 1050566, 1235960, 1910120, 2101132, 2626415, 4202264, 5252830, 10505660, 21011320]

約数ペア:

[(1, 21011320), (2, 10505660), (4, 5252830), (5, 4202264), (8, 2626415), (10, 2101132), (11, 1910120), (17, 1235960), (20, 1050566), (22, 955060), (34, 617980), (40, 525283), (44, 477530), (53, 396440), (55, 382024), (68, 308990), (85, 247192), (88, 238765), (106, 198220), (110, 191012), (136, 154495), (170, 123596), (187, 112360), (212, 99110), (220, 95506), (265, 79288), (340, 61798), (374, 56180), (424, 49555), (440, 47753), (530, 39644), (583, 36040), (680, 30899), (748, 28090), (901, 23320), (935, 22472), (1060, 19822), (1166, 18020), (1496, 14045), (1802, 11660), (1870, 11236), (2120, 9911), (2332, 9010), (2809, 7480), (2915, 7208), (3604, 5830), (3740, 5618), (4505, 4664)]