21221888

素因数分解:

$2^9\times {\mathrm{181}}^1\times {\mathrm{229}}^1$

素因数の和:428

約数の個数: 40

約数和(自身を含む): 42822780

約数和(自身を除く): 21600892

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 181, 229, 256, 362, 458, 512, 724, 916, 1448, 1832, 2896, 3664, 5792, 7328, 11584, 14656, 23168, 29312, 41449, 46336, 58624, 82898, 92672, 117248, 165796, 331592, 663184, 1326368, 2652736, 5305472, 10610944, 21221888]

約数ペア:

[(1, 21221888), (2, 10610944), (4, 5305472), (8, 2652736), (16, 1326368), (32, 663184), (64, 331592), (128, 165796), (181, 117248), (229, 92672), (256, 82898), (362, 58624), (458, 46336), (512, 41449), (724, 29312), (916, 23168), (1448, 14656), (1832, 11584), (2896, 7328), (3664, 5792)]