21206220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7213}}^1$

素因数の和:7239

約数の個数: 72

約数和(自身を含む): 69081264

約数和(自身を除く): 47875044

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7213, 14426, 21639, 28852, 36065, 43278, 50491, 72130, 86556, 100982, 108195, 144260, 151473, 201964, 216390, 252455, 302946, 353437, 432780, 504910, 605892, 706874, 757365, 1009820, 1060311, 1413748, 1514730, 1767185, 2120622, 3029460, 3534370, 4241244, 5301555, 7068740, 10603110, 21206220]

約数ペア:

[(1, 21206220), (2, 10603110), (3, 7068740), (4, 5301555), (5, 4241244), (6, 3534370), (7, 3029460), (10, 2120622), (12, 1767185), (14, 1514730), (15, 1413748), (20, 1060311), (21, 1009820), (28, 757365), (30, 706874), (35, 605892), (42, 504910), (49, 432780), (60, 353437), (70, 302946), (84, 252455), (98, 216390), (105, 201964), (140, 151473), (147, 144260), (196, 108195), (210, 100982), (245, 86556), (294, 72130), (420, 50491), (490, 43278), (588, 36065), (735, 28852), (980, 21639), (1470, 14426), (2940, 7213)]