19907406

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:537

約数の個数: 48

約数和(自身を含む): 45029088

約数和(自身を除く): 25121682

約数列:

[1, 2, 3, 6, 9, 18, 37, 71, 74, 111, 142, 213, 222, 333, 421, 426, 639, 666, 842, 1263, 1278, 2526, 2627, 3789, 5254, 7578, 7881, 15577, 15762, 23643, 29891, 31154, 46731, 47286, 59782, 89673, 93462, 140193, 179346, 269019, 280386, 538038, 1105967, 2211934, 3317901, 6635802, 9953703, 19907406]

約数ペア:

[(1, 19907406), (2, 9953703), (3, 6635802), (6, 3317901), (9, 2211934), (18, 1105967), (37, 538038), (71, 280386), (74, 269019), (111, 179346), (142, 140193), (213, 93462), (222, 89673), (333, 59782), (421, 47286), (426, 46731), (639, 31154), (666, 29891), (842, 23643), (1263, 15762), (1278, 15577), (2526, 7881), (2627, 7578), (3789, 5254)]