21143984

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{907}}^1$

素因数の和:993

約数の個数: 40

約数和(自身を含む): 43235328

約数和(自身を除く): 22091344

約数列:

[1, 2, 4, 8, 16, 31, 47, 62, 94, 124, 188, 248, 376, 496, 752, 907, 1457, 1814, 2914, 3628, 5828, 7256, 11656, 14512, 23312, 28117, 42629, 56234, 85258, 112468, 170516, 224936, 341032, 449872, 682064, 1321499, 2642998, 5285996, 10571992, 21143984]

約数ペア:

[(1, 21143984), (2, 10571992), (4, 5285996), (8, 2642998), (16, 1321499), (31, 682064), (47, 449872), (62, 341032), (94, 224936), (124, 170516), (188, 112468), (248, 85258), (376, 56234), (496, 42629), (752, 28117), (907, 23312), (1457, 14512), (1814, 11656), (2914, 7256), (3628, 5828)]