19985104

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:347

約数の個数: 40

約数和(自身を含む): 39858560

約数和(自身を除く): 19873456

約数列:

[1, 2, 4, 8, 16, 79, 97, 158, 163, 194, 316, 326, 388, 632, 652, 776, 1264, 1304, 1552, 2608, 7663, 12877, 15326, 15811, 25754, 30652, 31622, 51508, 61304, 63244, 103016, 122608, 126488, 206032, 252976, 1249069, 2498138, 4996276, 9992552, 19985104]

約数ペア:

[(1, 19985104), (2, 9992552), (4, 4996276), (8, 2498138), (16, 1249069), (79, 252976), (97, 206032), (158, 126488), (163, 122608), (194, 103016), (316, 63244), (326, 61304), (388, 51508), (632, 31622), (652, 30652), (776, 25754), (1264, 15811), (1304, 15326), (1552, 12877), (2608, 7663)]