21691875

素因数分解:

$3^1\times 5^4\times {\mathrm{23}}^1\times {\mathrm{503}}^1$

素因数の和:549

約数の個数: 40

約数和(自身を含む): 37787904

約数和(自身を除く): 16096029

約数列:

[1, 3, 5, 15, 23, 25, 69, 75, 115, 125, 345, 375, 503, 575, 625, 1509, 1725, 1875, 2515, 2875, 7545, 8625, 11569, 12575, 14375, 34707, 37725, 43125, 57845, 62875, 173535, 188625, 289225, 314375, 867675, 943125, 1446125, 4338375, 7230625, 21691875]

約数ペア:

[(1, 21691875), (3, 7230625), (5, 4338375), (15, 1446125), (23, 943125), (25, 867675), (69, 314375), (75, 289225), (115, 188625), (125, 173535), (345, 62875), (375, 57845), (503, 43125), (575, 37725), (625, 34707), (1509, 14375), (1725, 12575), (1875, 11569), (2515, 8625), (2875, 7545)]