19985901

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{431}}^1$

素因数の和:517

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 10496019

約数列:

[1, 3, 13, 29, 39, 41, 87, 123, 377, 431, 533, 1131, 1189, 1293, 1599, 3567, 5603, 12499, 15457, 16809, 17671, 37497, 46371, 53013, 162487, 229723, 487461, 512459, 689169, 1537377, 6661967, 19985901]

約数ペア:

[(1, 19985901), (3, 6661967), (13, 1537377), (29, 689169), (39, 512459), (41, 487461), (87, 229723), (123, 162487), (377, 53013), (431, 46371), (533, 37497), (1131, 17671), (1189, 16809), (1293, 15457), (1599, 12499), (3567, 5603)]