19987312

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{683}}^1$

素因数の和:781

約数の個数: 40

約数和(自身を含む): 40711680

約数和(自身を除く): 20724368

約数列:

[1, 2, 4, 8, 16, 31, 59, 62, 118, 124, 236, 248, 472, 496, 683, 944, 1366, 1829, 2732, 3658, 5464, 7316, 10928, 14632, 21173, 29264, 40297, 42346, 80594, 84692, 161188, 169384, 322376, 338768, 644752, 1249207, 2498414, 4996828, 9993656, 19987312]

約数ペア:

[(1, 19987312), (2, 9993656), (4, 4996828), (8, 2498414), (16, 1249207), (31, 644752), (59, 338768), (62, 322376), (118, 169384), (124, 161188), (236, 84692), (248, 80594), (472, 42346), (496, 40297), (683, 29264), (944, 21173), (1366, 14632), (1829, 10928), (2732, 7316), (3658, 5464)]