19779860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{523}}^1$

素因数の和:624

約数の個数: 48

約数和(自身を含む): 43663872

約数和(自身を除く): 23884012

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 523, 610, 620, 1046, 1220, 1891, 2092, 2615, 3782, 5230, 7564, 9455, 10460, 16213, 18910, 31903, 32426, 37820, 63806, 64852, 81065, 127612, 159515, 162130, 319030, 324260, 638060, 988993, 1977986, 3955972, 4944965, 9889930, 19779860]

約数ペア:

[(1, 19779860), (2, 9889930), (4, 4944965), (5, 3955972), (10, 1977986), (20, 988993), (31, 638060), (61, 324260), (62, 319030), (122, 162130), (124, 159515), (155, 127612), (244, 81065), (305, 64852), (310, 63806), (523, 37820), (610, 32426), (620, 31903), (1046, 18910), (1220, 16213), (1891, 10460), (2092, 9455), (2615, 7564), (3782, 5230)]