21256638

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:257

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 27127362

約数列:

[1, 2, 3, 6, 13, 26, 31, 39, 59, 62, 78, 93, 118, 149, 177, 186, 298, 354, 403, 447, 767, 806, 894, 1209, 1534, 1829, 1937, 2301, 2418, 3658, 3874, 4602, 4619, 5487, 5811, 8791, 9238, 10974, 11622, 13857, 17582, 23777, 26373, 27714, 47554, 52746, 60047, 71331, 114283, 120094, 142662, 180141, 228566, 272521, 342849, 360282, 545042, 685698, 817563, 1635126, 3542773, 7085546, 10628319, 21256638]

約数ペア:

[(1, 21256638), (2, 10628319), (3, 7085546), (6, 3542773), (13, 1635126), (26, 817563), (31, 685698), (39, 545042), (59, 360282), (62, 342849), (78, 272521), (93, 228566), (118, 180141), (149, 142662), (177, 120094), (186, 114283), (298, 71331), (354, 60047), (403, 52746), (447, 47554), (767, 27714), (806, 26373), (894, 23777), (1209, 17582), (1534, 13857), (1829, 11622), (1937, 10974), (2301, 9238), (2418, 8791), (3658, 5811), (3874, 5487), (4602, 4619)]