20112800

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{811}}^1$

素因数の和:862

約数の個数: 72

約数和(自身を含む): 50746752

約数和(自身を除く): 30633952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 155, 160, 200, 248, 310, 400, 496, 620, 775, 800, 811, 992, 1240, 1550, 1622, 2480, 3100, 3244, 4055, 4960, 6200, 6488, 8110, 12400, 12976, 16220, 20275, 24800, 25141, 25952, 32440, 40550, 50282, 64880, 81100, 100564, 125705, 129760, 162200, 201128, 251410, 324400, 402256, 502820, 628525, 648800, 804512, 1005640, 1257050, 2011280, 2514100, 4022560, 5028200, 10056400, 20112800]

約数ペア:

[(1, 20112800), (2, 10056400), (4, 5028200), (5, 4022560), (8, 2514100), (10, 2011280), (16, 1257050), (20, 1005640), (25, 804512), (31, 648800), (32, 628525), (40, 502820), (50, 402256), (62, 324400), (80, 251410), (100, 201128), (124, 162200), (155, 129760), (160, 125705), (200, 100564), (248, 81100), (310, 64880), (400, 50282), (496, 40550), (620, 32440), (775, 25952), (800, 25141), (811, 24800), (992, 20275), (1240, 16220), (1550, 12976), (1622, 12400), (2480, 8110), (3100, 6488), (3244, 6200), (4055, 4960)]