20729600

素因数分解:

$2^8\times 5^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 108

約数和(自身を含む): 53225760

約数和(自身を除く): 32496160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 64, 79, 80, 82, 100, 128, 158, 160, 164, 200, 205, 256, 316, 320, 328, 395, 400, 410, 632, 640, 656, 790, 800, 820, 1025, 1264, 1280, 1312, 1580, 1600, 1640, 1975, 2050, 2528, 2624, 3160, 3200, 3239, 3280, 3950, 4100, 5056, 5248, 6320, 6400, 6478, 6560, 7900, 8200, 10112, 10496, 12640, 12956, 13120, 15800, 16195, 16400, 20224, 25280, 25912, 26240, 31600, 32390, 32800, 50560, 51824, 52480, 63200, 64780, 65600, 80975, 101120, 103648, 126400, 129560, 131200, 161950, 207296, 252800, 259120, 262400, 323900, 414592, 505600, 518240, 647800, 829184, 1036480, 1295600, 2072960, 2591200, 4145920, 5182400, 10364800, 20729600]

約数ペア:

[(1, 20729600), (2, 10364800), (4, 5182400), (5, 4145920), (8, 2591200), (10, 2072960), (16, 1295600), (20, 1036480), (25, 829184), (32, 647800), (40, 518240), (41, 505600), (50, 414592), (64, 323900), (79, 262400), (80, 259120), (82, 252800), (100, 207296), (128, 161950), (158, 131200), (160, 129560), (164, 126400), (200, 103648), (205, 101120), (256, 80975), (316, 65600), (320, 64780), (328, 63200), (395, 52480), (400, 51824), (410, 50560), (632, 32800), (640, 32390), (656, 31600), (790, 26240), (800, 25912), (820, 25280), (1025, 20224), (1264, 16400), (1280, 16195), (1312, 15800), (1580, 13120), (1600, 12956), (1640, 12640), (1975, 10496), (2050, 10112), (2528, 8200), (2624, 7900), (3160, 6560), (3200, 6478), (3239, 6400), (3280, 6320), (3950, 5248), (4100, 5056)]