278399990

素因数分解:

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

素因数の和:194

約数の個数: 64

約数和(自身を含む): 589965120

約数和(自身を除く): 311565130

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 53, 55, 85, 106, 110, 170, 187, 265, 374, 530, 583, 901, 935, 1166, 1802, 1870, 2809, 2915, 4505, 5618, 5830, 9010, 9911, 14045, 19822, 28090, 30899, 47753, 49555, 61798, 95506, 99110, 148877, 154495, 238765, 297754, 308990, 477530, 525283, 744385, 1050566, 1488770, 1637647, 2530909, 2626415, 3275294, 5061818, 5252830, 8188235, 12654545, 16376470, 25309090, 27839999, 55679998, 139199995, 278399990]

約数ペア:

[(1, 278399990), (2, 139199995), (5, 55679998), (10, 27839999), (11, 25309090), (17, 16376470), (22, 12654545), (34, 8188235), (53, 5252830), (55, 5061818), (85, 3275294), (106, 2626415), (110, 2530909), (170, 1637647), (187, 1488770), (265, 1050566), (374, 744385), (530, 525283), (583, 477530), (901, 308990), (935, 297754), (1166, 238765), (1802, 154495), (1870, 148877), (2809, 99110), (2915, 95506), (4505, 61798), (5618, 49555), (5830, 47753), (9010, 30899), (9911, 28090), (14045, 19822)]