640559018

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:371

約数の個数: 64

約数和(自身を含む): 1119744000

約数和(自身を除く): 479184982

約数列:

[1, 2, 11, 22, 29, 58, 71, 79, 142, 158, 179, 319, 358, 638, 781, 869, 1562, 1738, 1969, 2059, 2291, 3938, 4118, 4582, 5191, 5609, 10382, 11218, 12709, 14141, 22649, 25201, 25418, 28282, 45298, 50402, 57101, 61699, 114202, 123398, 139799, 155551, 162661, 279598, 311102, 325322, 368561, 410089, 737122, 820178, 1004011, 1789271, 2008022, 3578542, 4054171, 4510979, 8108342, 9021958, 11044121, 22088242, 29116319, 58232638, 320279509, 640559018]

約数ペア:

[(1, 640559018), (2, 320279509), (11, 58232638), (22, 29116319), (29, 22088242), (58, 11044121), (71, 9021958), (79, 8108342), (142, 4510979), (158, 4054171), (179, 3578542), (319, 2008022), (358, 1789271), (638, 1004011), (781, 820178), (869, 737122), (1562, 410089), (1738, 368561), (1969, 325322), (2059, 311102), (2291, 279598), (3938, 162661), (4118, 155551), (4582, 139799), (5191, 123398), (5609, 114202), (10382, 61699), (11218, 57101), (12709, 50402), (14141, 45298), (22649, 28282), (25201, 25418)]