21427900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{311}}^1$

素因数の和:391

約数の個数: 72

約数和(自身を含む): 51184224

約数和(自身を除く): 29756324

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 53, 65, 100, 106, 130, 212, 260, 265, 311, 325, 530, 622, 650, 689, 1060, 1244, 1300, 1325, 1378, 1555, 2650, 2756, 3110, 3445, 4043, 5300, 6220, 6890, 7775, 8086, 13780, 15550, 16172, 16483, 17225, 20215, 31100, 32966, 34450, 40430, 65932, 68900, 80860, 82415, 101075, 164830, 202150, 214279, 329660, 404300, 412075, 428558, 824150, 857116, 1071395, 1648300, 2142790, 4285580, 5356975, 10713950, 21427900]

約数ペア:

[(1, 21427900), (2, 10713950), (4, 5356975), (5, 4285580), (10, 2142790), (13, 1648300), (20, 1071395), (25, 857116), (26, 824150), (50, 428558), (52, 412075), (53, 404300), (65, 329660), (100, 214279), (106, 202150), (130, 164830), (212, 101075), (260, 82415), (265, 80860), (311, 68900), (325, 65932), (530, 40430), (622, 34450), (650, 32966), (689, 31100), (1060, 20215), (1244, 17225), (1300, 16483), (1325, 16172), (1378, 15550), (1555, 13780), (2650, 8086), (2756, 7775), (3110, 6890), (3445, 6220), (4043, 5300)]