139354420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{991}}^1$

素因数の和:1168

約数の個数: 48

約数和(自身を含む): 299980800

約数和(自身を除く): 160626380

約数列:

[1, 2, 4, 5, 10, 20, 79, 89, 158, 178, 316, 356, 395, 445, 790, 890, 991, 1580, 1780, 1982, 3964, 4955, 7031, 9910, 14062, 19820, 28124, 35155, 70310, 78289, 88199, 140620, 156578, 176398, 313156, 352796, 391445, 440995, 782890, 881990, 1565780, 1763980, 6967721, 13935442, 27870884, 34838605, 69677210, 139354420]

約数ペア:

[(1, 139354420), (2, 69677210), (4, 34838605), (5, 27870884), (10, 13935442), (20, 6967721), (79, 1763980), (89, 1565780), (158, 881990), (178, 782890), (316, 440995), (356, 391445), (395, 352796), (445, 313156), (790, 176398), (890, 156578), (991, 140620), (1580, 88199), (1780, 78289), (1982, 70310), (3964, 35155), (4955, 28124), (7031, 19820), (9910, 14062)]