19811728

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{677}}^1$

素因数の和:775

約数の個数: 40

約数和(自身を含む): 40354560

約数和(自身を除く): 20542832

約数列:

[1, 2, 4, 8, 16, 31, 59, 62, 118, 124, 236, 248, 472, 496, 677, 944, 1354, 1829, 2708, 3658, 5416, 7316, 10832, 14632, 20987, 29264, 39943, 41974, 79886, 83948, 159772, 167896, 319544, 335792, 639088, 1238233, 2476466, 4952932, 9905864, 19811728]

約数ペア:

[(1, 19811728), (2, 9905864), (4, 4952932), (8, 2476466), (16, 1238233), (31, 639088), (59, 335792), (62, 319544), (118, 167896), (124, 159772), (236, 83948), (248, 79886), (472, 41974), (496, 39943), (677, 29264), (944, 20987), (1354, 14632), (1829, 10832), (2708, 7316), (3658, 5416)]