20257120

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9739}}^1$

素因数の和:9767

約数の個数: 48

約数和(自身を含む): 51544080

約数和(自身を除く): 31286960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9739, 19478, 38956, 48695, 77912, 97390, 126607, 155824, 194780, 253214, 311648, 389560, 506428, 633035, 779120, 1012856, 1266070, 1558240, 2025712, 2532140, 4051424, 5064280, 10128560, 20257120]

約数ペア:

[(1, 20257120), (2, 10128560), (4, 5064280), (5, 4051424), (8, 2532140), (10, 2025712), (13, 1558240), (16, 1266070), (20, 1012856), (26, 779120), (32, 633035), (40, 506428), (52, 389560), (65, 311648), (80, 253214), (104, 194780), (130, 155824), (160, 126607), (208, 97390), (260, 77912), (416, 48695), (520, 38956), (1040, 19478), (2080, 9739)]