20123900

素因数分解:

$2^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{3299}}^1$

素因数の和:3374

約数の個数: 36

約数和(自身を含む): 44398200

約数和(自身を除く): 24274300

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 244, 305, 610, 1220, 1525, 3050, 3299, 6100, 6598, 13196, 16495, 32990, 65980, 82475, 164950, 201239, 329900, 402478, 804956, 1006195, 2012390, 4024780, 5030975, 10061950, 20123900]

約数ペア:

[(1, 20123900), (2, 10061950), (4, 5030975), (5, 4024780), (10, 2012390), (20, 1006195), (25, 804956), (50, 402478), (61, 329900), (100, 201239), (122, 164950), (244, 82475), (305, 65980), (610, 32990), (1220, 16495), (1525, 13196), (3050, 6598), (3299, 6100)]