20653997

素因数分解:

$7^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{79}}^1$

素因数の和:142

約数の個数: 32

約数和(自身を含む): 27417600

約数和(自身を除く): 6763603

約数列:

[1, 7, 13, 17, 79, 91, 119, 169, 221, 553, 1027, 1183, 1343, 1547, 2197, 2873, 7189, 9401, 13351, 15379, 17459, 20111, 37349, 93457, 122213, 173563, 226967, 261443, 1214941, 1588769, 2950571, 20653997]

約数ペア:

[(1, 20653997), (7, 2950571), (13, 1588769), (17, 1214941), (79, 261443), (91, 226967), (119, 173563), (169, 122213), (221, 93457), (553, 37349), (1027, 20111), (1183, 17459), (1343, 15379), (1547, 13351), (2197, 9401), (2873, 7189)]