18391664

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{661}}^1$

素因数の和:753

約数の個数: 40

約数和(自身を含む): 37432128

約数和(自身を除く): 19040464

約数列:

[1, 2, 4, 8, 16, 37, 47, 74, 94, 148, 188, 296, 376, 592, 661, 752, 1322, 1739, 2644, 3478, 5288, 6956, 10576, 13912, 24457, 27824, 31067, 48914, 62134, 97828, 124268, 195656, 248536, 391312, 497072, 1149479, 2298958, 4597916, 9195832, 18391664]

約数ペア:

[(1, 18391664), (2, 9195832), (4, 4597916), (8, 2298958), (16, 1149479), (37, 497072), (47, 391312), (74, 248536), (94, 195656), (148, 124268), (188, 97828), (296, 62134), (376, 48914), (592, 31067), (661, 27824), (752, 24457), (1322, 13912), (1739, 10576), (2644, 6956), (3478, 5288)]