20909200

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{4021}}^1$

素因数の和:4052

約数の個数: 60

約数和(自身を含む): 54111988

約数和(自身を除く): 33202788

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 4021, 5200, 8042, 16084, 20105, 32168, 40210, 52273, 64336, 80420, 100525, 104546, 160840, 201050, 209092, 261365, 321680, 402100, 418184, 522730, 804200, 836368, 1045460, 1306825, 1608400, 2090920, 2613650, 4181840, 5227300, 10454600, 20909200]

約数ペア:

[(1, 20909200), (2, 10454600), (4, 5227300), (5, 4181840), (8, 2613650), (10, 2090920), (13, 1608400), (16, 1306825), (20, 1045460), (25, 836368), (26, 804200), (40, 522730), (50, 418184), (52, 402100), (65, 321680), (80, 261365), (100, 209092), (104, 201050), (130, 160840), (200, 104546), (208, 100525), (260, 80420), (325, 64336), (400, 52273), (520, 40210), (650, 32168), (1040, 20105), (1300, 16084), (2600, 8042), (4021, 5200)]