19966520

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:253

約数の個数: 96

約数和(自身を含む): 53434080

約数和(自身を除く): 33467560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 61, 70, 98, 122, 140, 167, 196, 244, 245, 280, 305, 334, 392, 427, 488, 490, 610, 668, 835, 854, 980, 1169, 1220, 1336, 1670, 1708, 1960, 2135, 2338, 2440, 2989, 3340, 3416, 4270, 4676, 5845, 5978, 6680, 8183, 8540, 9352, 10187, 11690, 11956, 14945, 16366, 17080, 20374, 23380, 23912, 29890, 32732, 40748, 40915, 46760, 50935, 59780, 65464, 71309, 81496, 81830, 101870, 119560, 142618, 163660, 203740, 285236, 327320, 356545, 407480, 499163, 570472, 713090, 998326, 1426180, 1996652, 2495815, 2852360, 3993304, 4991630, 9983260, 19966520]

約数ペア:

[(1, 19966520), (2, 9983260), (4, 4991630), (5, 3993304), (7, 2852360), (8, 2495815), (10, 1996652), (14, 1426180), (20, 998326), (28, 713090), (35, 570472), (40, 499163), (49, 407480), (56, 356545), (61, 327320), (70, 285236), (98, 203740), (122, 163660), (140, 142618), (167, 119560), (196, 101870), (244, 81830), (245, 81496), (280, 71309), (305, 65464), (334, 59780), (392, 50935), (427, 46760), (488, 40915), (490, 40748), (610, 32732), (668, 29890), (835, 23912), (854, 23380), (980, 20374), (1169, 17080), (1220, 16366), (1336, 14945), (1670, 11956), (1708, 11690), (1960, 10187), (2135, 9352), (2338, 8540), (2440, 8183), (2989, 6680), (3340, 5978), (3416, 5845), (4270, 4676)]