19808750

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:111

約数の個数: 80

約数和(自身を含む): 42511392

約数和(自身を除く): 22702642

約数列:

[1, 2, 5, 10, 13, 23, 25, 26, 46, 50, 53, 65, 106, 115, 125, 130, 230, 250, 265, 299, 325, 530, 575, 598, 625, 650, 689, 1150, 1219, 1250, 1325, 1378, 1495, 1625, 2438, 2650, 2875, 2990, 3250, 3445, 5750, 6095, 6625, 6890, 7475, 8125, 12190, 13250, 14375, 14950, 15847, 16250, 17225, 28750, 30475, 31694, 33125, 34450, 37375, 60950, 66250, 74750, 79235, 86125, 152375, 158470, 172250, 186875, 304750, 373750, 396175, 430625, 761875, 792350, 861250, 1523750, 1980875, 3961750, 9904375, 19808750]

約数ペア:

[(1, 19808750), (2, 9904375), (5, 3961750), (10, 1980875), (13, 1523750), (23, 861250), (25, 792350), (26, 761875), (46, 430625), (50, 396175), (53, 373750), (65, 304750), (106, 186875), (115, 172250), (125, 158470), (130, 152375), (230, 86125), (250, 79235), (265, 74750), (299, 66250), (325, 60950), (530, 37375), (575, 34450), (598, 33125), (625, 31694), (650, 30475), (689, 28750), (1150, 17225), (1219, 16250), (1250, 15847), (1325, 14950), (1378, 14375), (1495, 13250), (1625, 12190), (2438, 8125), (2650, 7475), (2875, 6890), (2990, 6625), (3250, 6095), (3445, 5750)]