19718504

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{587}}^1$

素因数の和:642

約数の個数: 64

約数和(自身を含む): 44452800

約数和(自身を除く): 24734296

約数列:

[1, 2, 4, 8, 13, 17, 19, 26, 34, 38, 52, 68, 76, 104, 136, 152, 221, 247, 323, 442, 494, 587, 646, 884, 988, 1174, 1292, 1768, 1976, 2348, 2584, 4199, 4696, 7631, 8398, 9979, 11153, 15262, 16796, 19958, 22306, 30524, 33592, 39916, 44612, 61048, 79832, 89224, 129727, 144989, 189601, 259454, 289978, 379202, 518908, 579956, 758404, 1037816, 1159912, 1516808, 2464813, 4929626, 9859252, 19718504]

約数ペア:

[(1, 19718504), (2, 9859252), (4, 4929626), (8, 2464813), (13, 1516808), (17, 1159912), (19, 1037816), (26, 758404), (34, 579956), (38, 518908), (52, 379202), (68, 289978), (76, 259454), (104, 189601), (136, 144989), (152, 129727), (221, 89224), (247, 79832), (323, 61048), (442, 44612), (494, 39916), (587, 33592), (646, 30524), (884, 22306), (988, 19958), (1174, 16796), (1292, 15262), (1768, 11153), (1976, 9979), (2348, 8398), (2584, 7631), (4199, 4696)]