20722780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6131}}^1$

素因数の和:6166

約数の個数: 36

約数和(自身を含む): 47130552

約数和(自身を除く): 26407772

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6131, 12262, 24524, 30655, 61310, 79703, 122620, 159406, 318812, 398515, 797030, 1036139, 1594060, 2072278, 4144556, 5180695, 10361390, 20722780]

約数ペア:

[(1, 20722780), (2, 10361390), (4, 5180695), (5, 4144556), (10, 2072278), (13, 1594060), (20, 1036139), (26, 797030), (52, 398515), (65, 318812), (130, 159406), (169, 122620), (260, 79703), (338, 61310), (676, 30655), (845, 24524), (1690, 12262), (3380, 6131)]