21013371

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{571}}^1$

素因数の和:656

約数の個数: 32

約数和(自身を含む): 32947200

約数和(自身を除く): 11933829

約数列:

[1, 3, 9, 27, 29, 47, 87, 141, 261, 423, 571, 783, 1269, 1363, 1713, 4089, 5139, 12267, 15417, 16559, 26837, 36801, 49677, 80511, 149031, 241533, 447093, 724599, 778273, 2334819, 7004457, 21013371]

約数ペア:

[(1, 21013371), (3, 7004457), (9, 2334819), (27, 778273), (29, 724599), (47, 447093), (87, 241533), (141, 149031), (261, 80511), (423, 49677), (571, 36801), (783, 26837), (1269, 16559), (1363, 15417), (1713, 12267), (4089, 5139)]