21099675

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 36828000

約数和(自身を除く): 15728325

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 89, 109, 145, 267, 327, 435, 445, 545, 725, 1335, 1635, 2175, 2225, 2581, 2725, 3161, 6675, 7743, 8175, 9483, 9701, 12905, 15805, 29103, 38715, 47415, 48505, 64525, 79025, 145515, 193575, 237075, 242525, 281329, 727575, 843987, 1406645, 4219935, 7033225, 21099675]

約数ペア:

[(1, 21099675), (3, 7033225), (5, 4219935), (15, 1406645), (25, 843987), (29, 727575), (75, 281329), (87, 242525), (89, 237075), (109, 193575), (145, 145515), (267, 79025), (327, 64525), (435, 48505), (445, 47415), (545, 38715), (725, 29103), (1335, 15805), (1635, 12905), (2175, 9701), (2225, 9483), (2581, 8175), (2725, 7743), (3161, 6675)]