21339375

素因数分解:

$3^1\times 5^4\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:641

約数の個数: 40

約数和(自身を含む): 37488000

約数和(自身を除く): 16148625

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 125, 285, 375, 475, 599, 625, 1425, 1797, 1875, 2375, 2995, 7125, 8985, 11381, 11875, 14975, 34143, 35625, 44925, 56905, 74875, 170715, 224625, 284525, 374375, 853575, 1123125, 1422625, 4267875, 7113125, 21339375]

約数ペア:

[(1, 21339375), (3, 7113125), (5, 4267875), (15, 1422625), (19, 1123125), (25, 853575), (57, 374375), (75, 284525), (95, 224625), (125, 170715), (285, 74875), (375, 56905), (475, 44925), (599, 35625), (625, 34143), (1425, 14975), (1797, 11875), (1875, 11381), (2375, 8985), (2995, 7125)]