21850965

素因数分解:

$3^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{331}}^1$

素因数の和:511

約数の個数: 40

約数和(自身を含む): 39529248

約数和(自身を除く): 17678283

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 163, 331, 405, 489, 815, 993, 1467, 1655, 2445, 2979, 4401, 4965, 7335, 8937, 13203, 14895, 22005, 26811, 44685, 53953, 66015, 134055, 161859, 269765, 485577, 809295, 1456731, 2427885, 4370193, 7283655, 21850965]

約数ペア:

[(1, 21850965), (3, 7283655), (5, 4370193), (9, 2427885), (15, 1456731), (27, 809295), (45, 485577), (81, 269765), (135, 161859), (163, 134055), (331, 66015), (405, 53953), (489, 44685), (815, 26811), (993, 22005), (1467, 14895), (1655, 13203), (2445, 8937), (2979, 7335), (4401, 4965)]