20809390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 44789760

約数和(自身を除く): 23980370

約数列:

[1, 2, 5, 7, 10, 14, 35, 53, 70, 71, 79, 106, 142, 158, 265, 355, 371, 395, 497, 530, 553, 710, 742, 790, 994, 1106, 1855, 2485, 2765, 3710, 3763, 4187, 4970, 5530, 5609, 7526, 8374, 11218, 18815, 20935, 26341, 28045, 29309, 37630, 39263, 41870, 52682, 56090, 58618, 78526, 131705, 146545, 196315, 263410, 293090, 297277, 392630, 594554, 1486385, 2080939, 2972770, 4161878, 10404695, 20809390]

約数ペア:

[(1, 20809390), (2, 10404695), (5, 4161878), (7, 2972770), (10, 2080939), (14, 1486385), (35, 594554), (53, 392630), (70, 297277), (71, 293090), (79, 263410), (106, 196315), (142, 146545), (158, 131705), (265, 78526), (355, 58618), (371, 56090), (395, 52682), (497, 41870), (530, 39263), (553, 37630), (710, 29309), (742, 28045), (790, 26341), (994, 20935), (1106, 18815), (1855, 11218), (2485, 8374), (2765, 7526), (3710, 5609), (3763, 5530), (4187, 4970)]