21354440

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:530

約数の個数: 64

約数和(自身を含む): 51030000

約数和(自身を除く): 29675560

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 41, 58, 82, 116, 145, 164, 205, 232, 290, 328, 410, 449, 580, 820, 898, 1160, 1189, 1640, 1796, 2245, 2378, 3592, 4490, 4756, 5945, 8980, 9512, 11890, 13021, 17960, 18409, 23780, 26042, 36818, 47560, 52084, 65105, 73636, 92045, 104168, 130210, 147272, 184090, 260420, 368180, 520840, 533861, 736360, 1067722, 2135444, 2669305, 4270888, 5338610, 10677220, 21354440]

約数ペア:

[(1, 21354440), (2, 10677220), (4, 5338610), (5, 4270888), (8, 2669305), (10, 2135444), (20, 1067722), (29, 736360), (40, 533861), (41, 520840), (58, 368180), (82, 260420), (116, 184090), (145, 147272), (164, 130210), (205, 104168), (232, 92045), (290, 73636), (328, 65105), (410, 52084), (449, 47560), (580, 36818), (820, 26042), (898, 23780), (1160, 18409), (1189, 17960), (1640, 13021), (1796, 11890), (2245, 9512), (2378, 8980), (3592, 5945), (4490, 4756)]