18767980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1741}}^1$

素因数の和:1775

約数の個数: 72

約数和(自身を含む): 50044176

約数和(自身を除く): 31276196

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 1741, 2156, 2695, 3482, 5390, 6964, 8705, 10780, 12187, 17410, 19151, 24374, 34820, 38302, 48748, 60935, 76604, 85309, 95755, 121870, 134057, 170618, 191510, 243740, 268114, 341236, 383020, 426545, 536228, 670285, 853090, 938399, 1340570, 1706180, 1876798, 2681140, 3753596, 4691995, 9383990, 18767980]

約数ペア:

[(1, 18767980), (2, 9383990), (4, 4691995), (5, 3753596), (7, 2681140), (10, 1876798), (11, 1706180), (14, 1340570), (20, 938399), (22, 853090), (28, 670285), (35, 536228), (44, 426545), (49, 383020), (55, 341236), (70, 268114), (77, 243740), (98, 191510), (110, 170618), (140, 134057), (154, 121870), (196, 95755), (220, 85309), (245, 76604), (308, 60935), (385, 48748), (490, 38302), (539, 34820), (770, 24374), (980, 19151), (1078, 17410), (1540, 12187), (1741, 10780), (2156, 8705), (2695, 6964), (3482, 5390)]