20960420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4243}}^1$

素因数の和:4284

約数の個数: 48

約数和(自身を含む): 49909440

約数和(自身を除く): 28949020

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4243, 4940, 8486, 16972, 21215, 42430, 55159, 80617, 84860, 110318, 161234, 220636, 275795, 322468, 403085, 551590, 806170, 1048021, 1103180, 1612340, 2096042, 4192084, 5240105, 10480210, 20960420]

約数ペア:

[(1, 20960420), (2, 10480210), (4, 5240105), (5, 4192084), (10, 2096042), (13, 1612340), (19, 1103180), (20, 1048021), (26, 806170), (38, 551590), (52, 403085), (65, 322468), (76, 275795), (95, 220636), (130, 161234), (190, 110318), (247, 84860), (260, 80617), (380, 55159), (494, 42430), (988, 21215), (1235, 16972), (2470, 8486), (4243, 4940)]