21391320

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{178261}}^1$

素因数の和:178275

約数の個数: 32

約数和(自身を含む): 64174320

約数和(自身を除く): 42783000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 178261, 356522, 534783, 713044, 891305, 1069566, 1426088, 1782610, 2139132, 2673915, 3565220, 4278264, 5347830, 7130440, 10695660, 21391320]

約数ペア:

[(1, 21391320), (2, 10695660), (3, 7130440), (4, 5347830), (5, 4278264), (6, 3565220), (8, 2673915), (10, 2139132), (12, 1782610), (15, 1426088), (20, 1069566), (24, 891305), (30, 713044), (40, 534783), (60, 356522), (120, 178261)]