389633840

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79843}}^1$

素因数の和:79917

約数の個数: 40

約数和(自身を含む): 920761008

約数和(自身を除く): 531127168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4880, 79843, 159686, 319372, 399215, 638744, 798430, 1277488, 1596860, 3193720, 4870423, 6387440, 9740846, 19481692, 24352115, 38963384, 48704230, 77926768, 97408460, 194816920, 389633840]

約数ペア:

[(1, 389633840), (2, 194816920), (4, 97408460), (5, 77926768), (8, 48704230), (10, 38963384), (16, 24352115), (20, 19481692), (40, 9740846), (61, 6387440), (80, 4870423), (122, 3193720), (244, 1596860), (305, 1277488), (488, 798430), (610, 638744), (976, 399215), (1220, 319372), (2440, 159686), (4880, 79843)]