21230960

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{233}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 53273376

約数和(自身を除く): 32042416

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 67, 68, 80, 85, 134, 136, 170, 233, 268, 272, 335, 340, 466, 536, 670, 680, 932, 1072, 1139, 1165, 1340, 1360, 1864, 2278, 2330, 2680, 3728, 3961, 4556, 4660, 5360, 5695, 7922, 9112, 9320, 11390, 15611, 15844, 18224, 18640, 19805, 22780, 31222, 31688, 39610, 45560, 62444, 63376, 78055, 79220, 91120, 124888, 156110, 158440, 249776, 265387, 312220, 316880, 530774, 624440, 1061548, 1248880, 1326935, 2123096, 2653870, 4246192, 5307740, 10615480, 21230960]

約数ペア:

[(1, 21230960), (2, 10615480), (4, 5307740), (5, 4246192), (8, 2653870), (10, 2123096), (16, 1326935), (17, 1248880), (20, 1061548), (34, 624440), (40, 530774), (67, 316880), (68, 312220), (80, 265387), (85, 249776), (134, 158440), (136, 156110), (170, 124888), (233, 91120), (268, 79220), (272, 78055), (335, 63376), (340, 62444), (466, 45560), (536, 39610), (670, 31688), (680, 31222), (932, 22780), (1072, 19805), (1139, 18640), (1165, 18224), (1340, 15844), (1360, 15611), (1864, 11390), (2278, 9320), (2330, 9112), (2680, 7922), (3728, 5695), (3961, 5360), (4556, 4660)]