19938704

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{659}}^1$

素因数の和:759

約数の個数: 40

約数和(自身を含む): 40592640

約数和(自身を除く): 20653936

約数列:

[1, 2, 4, 8, 16, 31, 61, 62, 122, 124, 244, 248, 488, 496, 659, 976, 1318, 1891, 2636, 3782, 5272, 7564, 10544, 15128, 20429, 30256, 40199, 40858, 80398, 81716, 160796, 163432, 321592, 326864, 643184, 1246169, 2492338, 4984676, 9969352, 19938704]

約数ペア:

[(1, 19938704), (2, 9969352), (4, 4984676), (8, 2492338), (16, 1246169), (31, 643184), (61, 326864), (62, 321592), (122, 163432), (124, 160796), (244, 81716), (248, 80398), (488, 40858), (496, 40199), (659, 30256), (976, 20429), (1318, 15128), (1891, 10544), (2636, 7564), (3782, 5272)]