19936720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8039}}^1$

素因数の和:8083

約数の個数: 40

約数和(自身を含む): 47854080

約数和(自身を除く): 27917360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8039, 16078, 32156, 40195, 64312, 80390, 128624, 160780, 249209, 321560, 498418, 643120, 996836, 1246045, 1993672, 2492090, 3987344, 4984180, 9968360, 19936720]

約数ペア:

[(1, 19936720), (2, 9968360), (4, 4984180), (5, 3987344), (8, 2492090), (10, 1993672), (16, 1246045), (20, 996836), (31, 643120), (40, 498418), (62, 321560), (80, 249209), (124, 160780), (155, 128624), (248, 80390), (310, 64312), (496, 40195), (620, 32156), (1240, 16078), (2480, 8039)]