18687500

素因数分解:

$2^2\times 5^6\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:70

約数の個数: 84

約数和(自身を含む): 45936912

約数和(自身を除く): 27249412

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 25, 26, 46, 50, 52, 65, 92, 100, 115, 125, 130, 230, 250, 260, 299, 325, 460, 500, 575, 598, 625, 650, 1150, 1196, 1250, 1300, 1495, 1625, 2300, 2500, 2875, 2990, 3125, 3250, 5750, 5980, 6250, 6500, 7475, 8125, 11500, 12500, 14375, 14950, 15625, 16250, 28750, 29900, 31250, 32500, 37375, 40625, 57500, 62500, 71875, 74750, 81250, 143750, 149500, 162500, 186875, 203125, 287500, 359375, 373750, 406250, 718750, 747500, 812500, 934375, 1437500, 1868750, 3737500, 4671875, 9343750, 18687500]

約数ペア:

[(1, 18687500), (2, 9343750), (4, 4671875), (5, 3737500), (10, 1868750), (13, 1437500), (20, 934375), (23, 812500), (25, 747500), (26, 718750), (46, 406250), (50, 373750), (52, 359375), (65, 287500), (92, 203125), (100, 186875), (115, 162500), (125, 149500), (130, 143750), (230, 81250), (250, 74750), (260, 71875), (299, 62500), (325, 57500), (460, 40625), (500, 37375), (575, 32500), (598, 31250), (625, 29900), (650, 28750), (1150, 16250), (1196, 15625), (1250, 14950), (1300, 14375), (1495, 12500), (1625, 11500), (2300, 8125), (2500, 7475), (2875, 6500), (2990, 6250), (3125, 5980), (3250, 5750)]