19915028

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{409}}^1$

素因数の和:504

約数の個数: 48

約数和(自身を含む): 41879040

約数和(自身を除く): 21964012

約数列:

[1, 2, 4, 7, 14, 28, 37, 47, 74, 94, 148, 188, 259, 329, 409, 518, 658, 818, 1036, 1316, 1636, 1739, 2863, 3478, 5726, 6956, 11452, 12173, 15133, 19223, 24346, 30266, 38446, 48692, 60532, 76892, 105931, 134561, 211862, 269122, 423724, 538244, 711251, 1422502, 2845004, 4978757, 9957514, 19915028]

約数ペア:

[(1, 19915028), (2, 9957514), (4, 4978757), (7, 2845004), (14, 1422502), (28, 711251), (37, 538244), (47, 423724), (74, 269122), (94, 211862), (148, 134561), (188, 105931), (259, 76892), (329, 60532), (409, 48692), (518, 38446), (658, 30266), (818, 24346), (1036, 19223), (1316, 15133), (1636, 12173), (1739, 11452), (2863, 6956), (3478, 5726)]