19990726

素因数分解:

$2^1\times 7^4\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:234

約数の個数: 40

約数和(自身を含む): 36704304

約数和(自身を除く): 16713578

約数列:

[1, 2, 7, 14, 23, 46, 49, 98, 161, 181, 322, 343, 362, 686, 1127, 1267, 2254, 2401, 2534, 4163, 4802, 7889, 8326, 8869, 15778, 17738, 29141, 55223, 58282, 62083, 110446, 124166, 203987, 407974, 434581, 869162, 1427909, 2855818, 9995363, 19990726]

約数ペア:

[(1, 19990726), (2, 9995363), (7, 2855818), (14, 1427909), (23, 869162), (46, 434581), (49, 407974), (98, 203987), (161, 124166), (181, 110446), (322, 62083), (343, 58282), (362, 55223), (686, 29141), (1127, 17738), (1267, 15778), (2254, 8869), (2401, 8326), (2534, 7889), (4163, 4802)]