21011456

素因数分解:

$2^{10}\times {\mathrm{17}}^2\times {\mathrm{71}}^1$

素因数の和:125

約数の個数: 66

約数和(自身を含む): 45246888

約数和(自身を除く): 24235432

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 64, 68, 71, 128, 136, 142, 256, 272, 284, 289, 512, 544, 568, 578, 1024, 1088, 1136, 1156, 1207, 2176, 2272, 2312, 2414, 4352, 4544, 4624, 4828, 8704, 9088, 9248, 9656, 17408, 18176, 18496, 19312, 20519, 36352, 36992, 38624, 41038, 72704, 73984, 77248, 82076, 147968, 154496, 164152, 295936, 308992, 328304, 617984, 656608, 1235968, 1313216, 2626432, 5252864, 10505728, 21011456]

約数ペア:

[(1, 21011456), (2, 10505728), (4, 5252864), (8, 2626432), (16, 1313216), (17, 1235968), (32, 656608), (34, 617984), (64, 328304), (68, 308992), (71, 295936), (128, 164152), (136, 154496), (142, 147968), (256, 82076), (272, 77248), (284, 73984), (289, 72704), (512, 41038), (544, 38624), (568, 36992), (578, 36352), (1024, 20519), (1088, 19312), (1136, 18496), (1156, 18176), (1207, 17408), (2176, 9656), (2272, 9248), (2312, 9088), (2414, 8704), (4352, 4828), (4544, 4624)]