20403675

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 39171600

約数和(自身を除く): 18767925

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 53, 59, 75, 87, 145, 159, 177, 225, 261, 265, 295, 435, 477, 531, 725, 795, 885, 1305, 1325, 1475, 1537, 1711, 2175, 2385, 2655, 3127, 3975, 4425, 4611, 5133, 6525, 7685, 8555, 9381, 11925, 13275, 13833, 15399, 15635, 23055, 25665, 28143, 38425, 42775, 46905, 69165, 76995, 78175, 90683, 115275, 128325, 140715, 234525, 272049, 345825, 384975, 453415, 703575, 816147, 1360245, 2267075, 4080735, 6801225, 20403675]

約数ペア:

[(1, 20403675), (3, 6801225), (5, 4080735), (9, 2267075), (15, 1360245), (25, 816147), (29, 703575), (45, 453415), (53, 384975), (59, 345825), (75, 272049), (87, 234525), (145, 140715), (159, 128325), (177, 115275), (225, 90683), (261, 78175), (265, 76995), (295, 69165), (435, 46905), (477, 42775), (531, 38425), (725, 28143), (795, 25665), (885, 23055), (1305, 15635), (1325, 15399), (1475, 13833), (1537, 13275), (1711, 11925), (2175, 9381), (2385, 8555), (2655, 7685), (3127, 6525), (3975, 5133), (4425, 4611)]