18973904

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{883}}^1$

素因数の和:987

約数の個数: 40

約数和(自身を含む): 39461760

約数和(自身を除く): 20487856

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 883, 1264, 1343, 1766, 2686, 3532, 5372, 7064, 10744, 14128, 15011, 21488, 30022, 60044, 69757, 120088, 139514, 240176, 279028, 558056, 1116112, 1185869, 2371738, 4743476, 9486952, 18973904]

約数ペア:

[(1, 18973904), (2, 9486952), (4, 4743476), (8, 2371738), (16, 1185869), (17, 1116112), (34, 558056), (68, 279028), (79, 240176), (136, 139514), (158, 120088), (272, 69757), (316, 60044), (632, 30022), (883, 21488), (1264, 15011), (1343, 14128), (1766, 10744), (2686, 7064), (3532, 5372)]