21972740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{1091}}^1$

素因数の和:1172

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 27560380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 53, 76, 95, 106, 190, 212, 265, 380, 530, 1007, 1060, 1091, 2014, 2182, 4028, 4364, 5035, 5455, 10070, 10910, 20140, 20729, 21820, 41458, 57823, 82916, 103645, 115646, 207290, 231292, 289115, 414580, 578230, 1098637, 1156460, 2197274, 4394548, 5493185, 10986370, 21972740]

約数ペア:

[(1, 21972740), (2, 10986370), (4, 5493185), (5, 4394548), (10, 2197274), (19, 1156460), (20, 1098637), (38, 578230), (53, 414580), (76, 289115), (95, 231292), (106, 207290), (190, 115646), (212, 103645), (265, 82916), (380, 57823), (530, 41458), (1007, 21820), (1060, 20729), (1091, 20140), (2014, 10910), (2182, 10070), (4028, 5455), (4364, 5035)]