18919796

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 39739392

約数和(自身を除く): 20819596

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 71, 124, 142, 217, 284, 307, 434, 497, 614, 868, 994, 1228, 1988, 2149, 2201, 4298, 4402, 8596, 8804, 9517, 15407, 19034, 21797, 30814, 38068, 43594, 61628, 66619, 87188, 133238, 152579, 266476, 305158, 610316, 675707, 1351414, 2702828, 4729949, 9459898, 18919796]

約数ペア:

[(1, 18919796), (2, 9459898), (4, 4729949), (7, 2702828), (14, 1351414), (28, 675707), (31, 610316), (62, 305158), (71, 266476), (124, 152579), (142, 133238), (217, 87188), (284, 66619), (307, 61628), (434, 43594), (497, 38068), (614, 30814), (868, 21797), (994, 19034), (1228, 15407), (1988, 9517), (2149, 8804), (2201, 8596), (4298, 4402)]