20783679

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{239}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 12117441

約数列:

[1, 3, 7, 21, 41, 101, 123, 239, 287, 303, 707, 717, 861, 1673, 2121, 4141, 5019, 9799, 12423, 24139, 28987, 29397, 68593, 72417, 86961, 168973, 205779, 506919, 989699, 2969097, 6927893, 20783679]

約数ペア:

[(1, 20783679), (3, 6927893), (7, 2969097), (21, 989699), (41, 506919), (101, 205779), (123, 168973), (239, 86961), (287, 72417), (303, 68593), (707, 29397), (717, 28987), (861, 24139), (1673, 12423), (2121, 9799), (4141, 5019)]