18913180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{389}}^1$

素因数の和:439

約数の個数: 96

約数和(自身を含む): 49533120

約数和(自身を除く): 30619940

約数列:

[1, 2, 4, 5, 10, 11, 13, 17, 20, 22, 26, 34, 44, 52, 55, 65, 68, 85, 110, 130, 143, 170, 187, 220, 221, 260, 286, 340, 374, 389, 442, 572, 715, 748, 778, 884, 935, 1105, 1430, 1556, 1870, 1945, 2210, 2431, 2860, 3740, 3890, 4279, 4420, 4862, 5057, 6613, 7780, 8558, 9724, 10114, 12155, 13226, 17116, 20228, 21395, 24310, 25285, 26452, 33065, 42790, 48620, 50570, 55627, 66130, 72743, 85580, 85969, 101140, 111254, 132260, 145486, 171938, 222508, 278135, 290972, 343876, 363715, 429845, 556270, 727430, 859690, 945659, 1112540, 1454860, 1719380, 1891318, 3782636, 4728295, 9456590, 18913180]

約数ペア:

[(1, 18913180), (2, 9456590), (4, 4728295), (5, 3782636), (10, 1891318), (11, 1719380), (13, 1454860), (17, 1112540), (20, 945659), (22, 859690), (26, 727430), (34, 556270), (44, 429845), (52, 363715), (55, 343876), (65, 290972), (68, 278135), (85, 222508), (110, 171938), (130, 145486), (143, 132260), (170, 111254), (187, 101140), (220, 85969), (221, 85580), (260, 72743), (286, 66130), (340, 55627), (374, 50570), (389, 48620), (442, 42790), (572, 33065), (715, 26452), (748, 25285), (778, 24310), (884, 21395), (935, 20228), (1105, 17116), (1430, 13226), (1556, 12155), (1870, 10114), (1945, 9724), (2210, 8558), (2431, 7780), (2860, 6613), (3740, 5057), (3890, 4862), (4279, 4420)]