253640440

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{103951}}^1$

素因数の和:104023

約数の個数: 32

約数和(自身を含む): 580052160

約数和(自身を除く): 326411720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 103951, 207902, 415804, 519755, 831608, 1039510, 2079020, 4158040, 6341011, 12682022, 25364044, 31705055, 50728088, 63410110, 126820220, 253640440]

約数ペア:

[(1, 253640440), (2, 126820220), (4, 63410110), (5, 50728088), (8, 31705055), (10, 25364044), (20, 12682022), (40, 6341011), (61, 4158040), (122, 2079020), (244, 1039510), (305, 831608), (488, 519755), (610, 415804), (1220, 207902), (2440, 103951)]