21657616

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{227}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 43256160

約数和(自身を除く): 21598544

約数列:

[1, 2, 4, 8, 16, 67, 89, 134, 178, 227, 268, 356, 454, 536, 712, 908, 1072, 1424, 1816, 3632, 5963, 11926, 15209, 20203, 23852, 30418, 40406, 47704, 60836, 80812, 95408, 121672, 161624, 243344, 323248, 1353601, 2707202, 5414404, 10828808, 21657616]

約数ペア:

[(1, 21657616), (2, 10828808), (4, 5414404), (8, 2707202), (16, 1353601), (67, 323248), (89, 243344), (134, 161624), (178, 121672), (227, 95408), (268, 80812), (356, 60836), (454, 47704), (536, 40406), (712, 30418), (908, 23852), (1072, 20203), (1424, 15209), (1816, 11926), (3632, 5963)]