20624720

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2503}}^1$

素因数の和:2619

約数の個数: 40

約数和(自身を含む): 48437376

約数和(自身を除く): 27812656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2503, 4120, 5006, 8240, 10012, 12515, 20024, 25030, 40048, 50060, 100120, 200240, 257809, 515618, 1031236, 1289045, 2062472, 2578090, 4124944, 5156180, 10312360, 20624720]

約数ペア:

[(1, 20624720), (2, 10312360), (4, 5156180), (5, 4124944), (8, 2578090), (10, 2062472), (16, 1289045), (20, 1031236), (40, 515618), (80, 257809), (103, 200240), (206, 100120), (412, 50060), (515, 40048), (824, 25030), (1030, 20024), (1648, 12515), (2060, 10012), (2503, 8240), (4120, 5006)]