20987500

素因数分解:

$2^2\times 5^5\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:125

約数の個数: 72

約数和(自身を含む): 48559392

約数和(自身を除く): 27571892

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 73, 92, 100, 115, 125, 146, 230, 250, 292, 365, 460, 500, 575, 625, 730, 1150, 1250, 1460, 1679, 1825, 2300, 2500, 2875, 3125, 3358, 3650, 5750, 6250, 6716, 7300, 8395, 9125, 11500, 12500, 14375, 16790, 18250, 28750, 33580, 36500, 41975, 45625, 57500, 71875, 83950, 91250, 143750, 167900, 182500, 209875, 228125, 287500, 419750, 456250, 839500, 912500, 1049375, 2098750, 4197500, 5246875, 10493750, 20987500]

約数ペア:

[(1, 20987500), (2, 10493750), (4, 5246875), (5, 4197500), (10, 2098750), (20, 1049375), (23, 912500), (25, 839500), (46, 456250), (50, 419750), (73, 287500), (92, 228125), (100, 209875), (115, 182500), (125, 167900), (146, 143750), (230, 91250), (250, 83950), (292, 71875), (365, 57500), (460, 45625), (500, 41975), (575, 36500), (625, 33580), (730, 28750), (1150, 18250), (1250, 16790), (1460, 14375), (1679, 12500), (1825, 11500), (2300, 9125), (2500, 8395), (2875, 7300), (3125, 6716), (3358, 6250), (3650, 5750)]