20118225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{509}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 36426240

約数和(自身を除く): 16308015

約数列:

[1, 3, 5, 15, 17, 25, 31, 51, 75, 85, 93, 155, 255, 425, 465, 509, 527, 775, 1275, 1527, 1581, 2325, 2545, 2635, 7635, 7905, 8653, 12725, 13175, 15779, 25959, 38175, 39525, 43265, 47337, 78895, 129795, 216325, 236685, 268243, 394475, 648975, 804729, 1183425, 1341215, 4023645, 6706075, 20118225]

約数ペア:

[(1, 20118225), (3, 6706075), (5, 4023645), (15, 1341215), (17, 1183425), (25, 804729), (31, 648975), (51, 394475), (75, 268243), (85, 236685), (93, 216325), (155, 129795), (255, 78895), (425, 47337), (465, 43265), (509, 39525), (527, 38175), (775, 25959), (1275, 15779), (1527, 13175), (1581, 12725), (2325, 8653), (2545, 7905), (2635, 7635)]