21443216

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{241}}^1$

素因数の和:399

約数の個数: 40

約数和(自身を含む): 42851424

約数和(自身を除く): 21408208

約数列:

[1, 2, 4, 8, 16, 67, 83, 134, 166, 241, 268, 332, 482, 536, 664, 964, 1072, 1328, 1928, 3856, 5561, 11122, 16147, 20003, 22244, 32294, 40006, 44488, 64588, 80012, 88976, 129176, 160024, 258352, 320048, 1340201, 2680402, 5360804, 10721608, 21443216]

約数ペア:

[(1, 21443216), (2, 10721608), (4, 5360804), (8, 2680402), (16, 1340201), (67, 320048), (83, 258352), (134, 160024), (166, 129176), (241, 88976), (268, 80012), (332, 64588), (482, 44488), (536, 40006), (664, 32294), (964, 22244), (1072, 20003), (1328, 16147), (1928, 11122), (3856, 5561)]