18448720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:260

約数の個数: 80

約数和(自身を含む): 45568512

約数和(自身を除く): 27119792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 43, 62, 80, 86, 124, 155, 172, 173, 215, 248, 310, 344, 346, 430, 496, 620, 688, 692, 860, 865, 1240, 1333, 1384, 1720, 1730, 2480, 2666, 2768, 3440, 3460, 5332, 5363, 6665, 6920, 7439, 10664, 10726, 13330, 13840, 14878, 21328, 21452, 26660, 26815, 29756, 37195, 42904, 53320, 53630, 59512, 74390, 85808, 106640, 107260, 119024, 148780, 214520, 230609, 297560, 429040, 461218, 595120, 922436, 1153045, 1844872, 2306090, 3689744, 4612180, 9224360, 18448720]

約数ペア:

[(1, 18448720), (2, 9224360), (4, 4612180), (5, 3689744), (8, 2306090), (10, 1844872), (16, 1153045), (20, 922436), (31, 595120), (40, 461218), (43, 429040), (62, 297560), (80, 230609), (86, 214520), (124, 148780), (155, 119024), (172, 107260), (173, 106640), (215, 85808), (248, 74390), (310, 59512), (344, 53630), (346, 53320), (430, 42904), (496, 37195), (620, 29756), (688, 26815), (692, 26660), (860, 21452), (865, 21328), (1240, 14878), (1333, 13840), (1384, 13330), (1720, 10726), (1730, 10664), (2480, 7439), (2666, 6920), (2768, 6665), (3440, 5363), (3460, 5332)]