20449975

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 31872960

約数和(自身を除く): 11422985

約数列:

[1, 5, 7, 13, 25, 35, 65, 89, 91, 101, 175, 325, 445, 455, 505, 623, 707, 1157, 1313, 2225, 2275, 2525, 3115, 3535, 5785, 6565, 8099, 8989, 9191, 15575, 17675, 28925, 32825, 40495, 44945, 45955, 62923, 116857, 202475, 224725, 229775, 314615, 584285, 817999, 1573075, 2921425, 4089995, 20449975]

約数ペア:

[(1, 20449975), (5, 4089995), (7, 2921425), (13, 1573075), (25, 817999), (35, 584285), (65, 314615), (89, 229775), (91, 224725), (101, 202475), (175, 116857), (325, 62923), (445, 45955), (455, 44945), (505, 40495), (623, 32825), (707, 28925), (1157, 17675), (1313, 15575), (2225, 9191), (2275, 8989), (2525, 8099), (3115, 6565), (3535, 5785)]