18969638

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:260

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 12134362

約数列:

[1, 2, 19, 38, 71, 79, 89, 142, 158, 178, 1349, 1501, 1691, 2698, 3002, 3382, 5609, 6319, 7031, 11218, 12638, 14062, 106571, 120061, 133589, 213142, 240122, 267178, 499201, 998402, 9484819, 18969638]

約数ペア:

[(1, 18969638), (2, 9484819), (19, 998402), (38, 499201), (71, 267178), (79, 240122), (89, 213142), (142, 133589), (158, 120061), (178, 106571), (1349, 14062), (1501, 12638), (1691, 11218), (2698, 7031), (3002, 6319), (3382, 5609)]