21506176

素因数分解:

$2^7\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:309

約数の個数: 64

約数和(自身を含む): 46512000

約数和(自身を除く): 25005824

約数列:

[1, 2, 4, 8, 16, 19, 32, 37, 38, 64, 74, 76, 128, 148, 152, 239, 296, 304, 478, 592, 608, 703, 956, 1184, 1216, 1406, 1912, 2368, 2432, 2812, 3824, 4541, 4736, 5624, 7648, 8843, 9082, 11248, 15296, 17686, 18164, 22496, 30592, 35372, 36328, 44992, 70744, 72656, 89984, 141488, 145312, 168017, 282976, 290624, 336034, 565952, 581248, 672068, 1131904, 1344136, 2688272, 5376544, 10753088, 21506176]

約数ペア:

[(1, 21506176), (2, 10753088), (4, 5376544), (8, 2688272), (16, 1344136), (19, 1131904), (32, 672068), (37, 581248), (38, 565952), (64, 336034), (74, 290624), (76, 282976), (128, 168017), (148, 145312), (152, 141488), (239, 89984), (296, 72656), (304, 70744), (478, 44992), (592, 36328), (608, 35372), (703, 30592), (956, 22496), (1184, 18164), (1216, 17686), (1406, 15296), (1912, 11248), (2368, 9082), (2432, 8843), (2812, 7648), (3824, 5624), (4541, 4736)]