640960458

素因数分解:

$2^1\times 3^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1\times {\mathrm{383}}^1$

素因数の和:659

約数の個数: 64

約数和(自身を含む): 1368686592

約数和(自身を除く): 727726134

約数列:

[1, 2, 3, 6, 23, 46, 67, 69, 134, 138, 181, 201, 362, 383, 402, 543, 766, 1086, 1149, 1541, 2298, 3082, 4163, 4623, 8326, 8809, 9246, 12127, 12489, 17618, 24254, 24978, 25661, 26427, 36381, 51322, 52854, 69323, 72762, 76983, 138646, 153966, 207969, 278921, 415938, 557842, 590203, 836763, 1180406, 1594429, 1673526, 1770609, 3188858, 3541218, 4644641, 4783287, 9289282, 9566574, 13933923, 27867846, 106826743, 213653486, 320480229, 640960458]

約数ペア:

[(1, 640960458), (2, 320480229), (3, 213653486), (6, 106826743), (23, 27867846), (46, 13933923), (67, 9566574), (69, 9289282), (134, 4783287), (138, 4644641), (181, 3541218), (201, 3188858), (362, 1770609), (383, 1673526), (402, 1594429), (543, 1180406), (766, 836763), (1086, 590203), (1149, 557842), (1541, 415938), (2298, 278921), (3082, 207969), (4163, 153966), (4623, 138646), (8326, 76983), (8809, 72762), (9246, 69323), (12127, 52854), (12489, 51322), (17618, 36381), (24254, 26427), (24978, 25661)]