20854925

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 11642995

約数列:

[1, 5, 7, 13, 25, 35, 65, 89, 91, 103, 175, 325, 445, 455, 515, 623, 721, 1157, 1339, 2225, 2275, 2575, 3115, 3605, 5785, 6695, 8099, 9167, 9373, 15575, 18025, 28925, 33475, 40495, 45835, 46865, 64169, 119171, 202475, 229175, 234325, 320845, 595855, 834197, 1604225, 2979275, 4170985, 20854925]

約数ペア:

[(1, 20854925), (5, 4170985), (7, 2979275), (13, 1604225), (25, 834197), (35, 595855), (65, 320845), (89, 234325), (91, 229175), (103, 202475), (175, 119171), (325, 64169), (445, 46865), (455, 45835), (515, 40495), (623, 33475), (721, 28925), (1157, 18025), (1339, 15575), (2225, 9373), (2275, 9167), (2575, 8099), (3115, 6695), (3605, 5785)]