20019812

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 38974320

約数和(自身を除く): 18954508

約数列:

[1, 2, 4, 17, 34, 37, 68, 73, 74, 109, 146, 148, 218, 292, 436, 629, 1241, 1258, 1853, 2482, 2516, 2701, 3706, 4033, 4964, 5402, 7412, 7957, 8066, 10804, 15914, 16132, 31828, 45917, 68561, 91834, 135269, 137122, 183668, 270538, 274244, 294409, 541076, 588818, 1177636, 5004953, 10009906, 20019812]

約数ペア:

[(1, 20019812), (2, 10009906), (4, 5004953), (17, 1177636), (34, 588818), (37, 541076), (68, 294409), (73, 274244), (74, 270538), (109, 183668), (146, 137122), (148, 135269), (218, 91834), (292, 68561), (436, 45917), (629, 31828), (1241, 16132), (1258, 15914), (1853, 10804), (2482, 8066), (2516, 7957), (2701, 7412), (3706, 5402), (4033, 4964)]