18688780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:319

約数の個数: 96

約数和(自身を含む): 47900160

約数和(自身を除く): 29211380

約数列:

[1, 2, 4, 5, 10, 11, 17, 19, 20, 22, 34, 38, 44, 55, 68, 76, 85, 95, 110, 170, 187, 190, 209, 220, 263, 323, 340, 374, 380, 418, 526, 646, 748, 836, 935, 1045, 1052, 1292, 1315, 1615, 1870, 2090, 2630, 2893, 3230, 3553, 3740, 4180, 4471, 4997, 5260, 5786, 6460, 7106, 8942, 9994, 11572, 14212, 14465, 17765, 17884, 19988, 22355, 24985, 28930, 35530, 44710, 49181, 49970, 54967, 57860, 71060, 84949, 89420, 98362, 99940, 109934, 169898, 196724, 219868, 245905, 274835, 339796, 424745, 491810, 549670, 849490, 934439, 983620, 1099340, 1698980, 1868878, 3737756, 4672195, 9344390, 18688780]

約数ペア:

[(1, 18688780), (2, 9344390), (4, 4672195), (5, 3737756), (10, 1868878), (11, 1698980), (17, 1099340), (19, 983620), (20, 934439), (22, 849490), (34, 549670), (38, 491810), (44, 424745), (55, 339796), (68, 274835), (76, 245905), (85, 219868), (95, 196724), (110, 169898), (170, 109934), (187, 99940), (190, 98362), (209, 89420), (220, 84949), (263, 71060), (323, 57860), (340, 54967), (374, 49970), (380, 49181), (418, 44710), (526, 35530), (646, 28930), (748, 24985), (836, 22355), (935, 19988), (1045, 17884), (1052, 17765), (1292, 14465), (1315, 14212), (1615, 11572), (1870, 9994), (2090, 8942), (2630, 7106), (2893, 6460), (3230, 5786), (3553, 5260), (3740, 4997), (4180, 4471)]