420214925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4003}}^1$

素因数の和:4062

約数の個数: 48

約数和(自身を含む): 625584960

約数和(自身を除く): 205370035

約数列:

[1, 5, 13, 17, 19, 25, 65, 85, 95, 221, 247, 323, 325, 425, 475, 1105, 1235, 1615, 4003, 4199, 5525, 6175, 8075, 20015, 20995, 52039, 68051, 76057, 100075, 104975, 260195, 340255, 380285, 884663, 988741, 1292969, 1300975, 1701275, 1901425, 4423315, 4943705, 6464845, 16808597, 22116575, 24718525, 32324225, 84042985, 420214925]

約数ペア:

[(1, 420214925), (5, 84042985), (13, 32324225), (17, 24718525), (19, 22116575), (25, 16808597), (65, 6464845), (85, 4943705), (95, 4423315), (221, 1901425), (247, 1701275), (323, 1300975), (325, 1292969), (425, 988741), (475, 884663), (1105, 380285), (1235, 340255), (1615, 260195), (4003, 104975), (4199, 100075), (5525, 76057), (6175, 68051), (8075, 52039), (20015, 20995)]