21080360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{953}}^1$

素因数の和:1050

約数の個数: 64

約数和(自身を含む): 54950400

約数和(自身を除く): 33870040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 953, 1106, 1580, 1906, 2212, 2765, 3160, 3812, 4424, 4765, 5530, 6671, 7624, 9530, 11060, 13342, 19060, 22120, 26684, 33355, 38120, 53368, 66710, 75287, 133420, 150574, 266840, 301148, 376435, 527009, 602296, 752870, 1054018, 1505740, 2108036, 2635045, 3011480, 4216072, 5270090, 10540180, 21080360]

約数ペア:

[(1, 21080360), (2, 10540180), (4, 5270090), (5, 4216072), (7, 3011480), (8, 2635045), (10, 2108036), (14, 1505740), (20, 1054018), (28, 752870), (35, 602296), (40, 527009), (56, 376435), (70, 301148), (79, 266840), (140, 150574), (158, 133420), (280, 75287), (316, 66710), (395, 53368), (553, 38120), (632, 33355), (790, 26684), (953, 22120), (1106, 19060), (1580, 13342), (1906, 11060), (2212, 9530), (2765, 7624), (3160, 6671), (3812, 5530), (4424, 4765)]