20502500

素因数分解:

$2^2\times 5^4\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:222

約数の個数: 60

約数和(自身を含む): 45922800

約数和(自身を除く): 25420300

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 59, 100, 118, 125, 139, 236, 250, 278, 295, 500, 556, 590, 625, 695, 1180, 1250, 1390, 1475, 2500, 2780, 2950, 3475, 5900, 6950, 7375, 8201, 13900, 14750, 16402, 17375, 29500, 32804, 34750, 36875, 41005, 69500, 73750, 82010, 86875, 147500, 164020, 173750, 205025, 347500, 410050, 820100, 1025125, 2050250, 4100500, 5125625, 10251250, 20502500]

約数ペア:

[(1, 20502500), (2, 10251250), (4, 5125625), (5, 4100500), (10, 2050250), (20, 1025125), (25, 820100), (50, 410050), (59, 347500), (100, 205025), (118, 173750), (125, 164020), (139, 147500), (236, 86875), (250, 82010), (278, 73750), (295, 69500), (500, 41005), (556, 36875), (590, 34750), (625, 32804), (695, 29500), (1180, 17375), (1250, 16402), (1390, 14750), (1475, 13900), (2500, 8201), (2780, 7375), (2950, 6950), (3475, 5900)]