19867640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2939}}^1$

素因数の和:2976

約数の個数: 48

約数和(自身を含む): 48421800

約数和(自身を除く): 28554160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 2939, 3380, 5878, 6760, 11756, 14695, 23512, 29390, 38207, 58780, 76414, 117560, 152828, 191035, 305656, 382070, 496691, 764140, 993382, 1528280, 1986764, 2483455, 3973528, 4966910, 9933820, 19867640]

約数ペア:

[(1, 19867640), (2, 9933820), (4, 4966910), (5, 3973528), (8, 2483455), (10, 1986764), (13, 1528280), (20, 993382), (26, 764140), (40, 496691), (52, 382070), (65, 305656), (104, 191035), (130, 152828), (169, 117560), (260, 76414), (338, 58780), (520, 38207), (676, 29390), (845, 23512), (1352, 14695), (1690, 11756), (2939, 6760), (3380, 5878)]