21116875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1$

素因数の和:169

約数の個数: 40

約数和(自身を含む): 29915424

約数和(自身を除く): 8798549

約数列:

[1, 5, 13, 23, 25, 65, 113, 115, 125, 299, 325, 565, 575, 625, 1469, 1495, 1625, 2599, 2825, 2875, 7345, 7475, 8125, 12995, 14125, 14375, 33787, 36725, 37375, 64975, 70625, 168935, 183625, 186875, 324875, 844675, 918125, 1624375, 4223375, 21116875]

約数ペア:

[(1, 21116875), (5, 4223375), (13, 1624375), (23, 918125), (25, 844675), (65, 324875), (113, 186875), (115, 183625), (125, 168935), (299, 70625), (325, 64975), (565, 37375), (575, 36725), (625, 33787), (1469, 14375), (1495, 14125), (1625, 12995), (2599, 8125), (2825, 7475), (2875, 7345)]