21373328

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{421}}^1$

素因数の和:615

約数の個数: 40

約数和(自身を含む): 43955520

約数和(自身を除く): 22582192

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 167, 304, 334, 421, 668, 842, 1336, 1684, 2672, 3173, 3368, 6346, 6736, 7999, 12692, 15998, 25384, 31996, 50768, 63992, 70307, 127984, 140614, 281228, 562456, 1124912, 1335833, 2671666, 5343332, 10686664, 21373328]

約数ペア:

[(1, 21373328), (2, 10686664), (4, 5343332), (8, 2671666), (16, 1335833), (19, 1124912), (38, 562456), (76, 281228), (152, 140614), (167, 127984), (304, 70307), (334, 63992), (421, 50768), (668, 31996), (842, 25384), (1336, 15998), (1684, 12692), (2672, 7999), (3173, 6736), (3368, 6346)]