19639120

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7919}}^1$

素因数の和:7963

約数の個数: 40

約数和(自身を含む): 47139840

約数和(自身を除く): 27500720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 7919, 15838, 31676, 39595, 63352, 79190, 126704, 158380, 245489, 316760, 490978, 633520, 981956, 1227445, 1963912, 2454890, 3927824, 4909780, 9819560, 19639120]

約数ペア:

[(1, 19639120), (2, 9819560), (4, 4909780), (5, 3927824), (8, 2454890), (10, 1963912), (16, 1227445), (20, 981956), (31, 633520), (40, 490978), (62, 316760), (80, 245489), (124, 158380), (155, 126704), (248, 79190), (310, 63352), (496, 39595), (620, 31676), (1240, 15838), (2480, 7919)]