20737575

素因数分解:

$3^2\times 5^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 39693888

約数和(自身を除く): 18956313

約数列:

[1, 3, 5, 9, 15, 25, 37, 45, 47, 53, 75, 111, 141, 159, 185, 225, 235, 265, 333, 423, 477, 555, 705, 795, 925, 1175, 1325, 1665, 1739, 1961, 2115, 2385, 2491, 2775, 3525, 3975, 5217, 5883, 7473, 8325, 8695, 9805, 10575, 11925, 12455, 15651, 17649, 22419, 26085, 29415, 37365, 43475, 49025, 62275, 78255, 88245, 92167, 112095, 130425, 147075, 186825, 276501, 391275, 441225, 460835, 560475, 829503, 1382505, 2304175, 4147515, 6912525, 20737575]

約数ペア:

[(1, 20737575), (3, 6912525), (5, 4147515), (9, 2304175), (15, 1382505), (25, 829503), (37, 560475), (45, 460835), (47, 441225), (53, 391275), (75, 276501), (111, 186825), (141, 147075), (159, 130425), (185, 112095), (225, 92167), (235, 88245), (265, 78255), (333, 62275), (423, 49025), (477, 43475), (555, 37365), (705, 29415), (795, 26085), (925, 22419), (1175, 17649), (1325, 15651), (1665, 12455), (1739, 11925), (1961, 10575), (2115, 9805), (2385, 8695), (2491, 8325), (2775, 7473), (3525, 5883), (3975, 5217)]