51455000

素因数分解:

$2^3\times 5^4\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:318

約数の個数: 80

約数和(自身を含む): 123991560

約数和(自身を除く): 72536560

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 251, 328, 410, 500, 502, 625, 820, 1000, 1004, 1025, 1250, 1255, 1640, 2008, 2050, 2500, 2510, 4100, 5000, 5020, 5125, 6275, 8200, 10040, 10250, 10291, 12550, 20500, 20582, 25100, 25625, 31375, 41000, 41164, 50200, 51250, 51455, 62750, 82328, 102500, 102910, 125500, 156875, 205000, 205820, 251000, 257275, 313750, 411640, 514550, 627500, 1029100, 1255000, 1286375, 2058200, 2572750, 5145500, 6431875, 10291000, 12863750, 25727500, 51455000]

約数ペア:

[(1, 51455000), (2, 25727500), (4, 12863750), (5, 10291000), (8, 6431875), (10, 5145500), (20, 2572750), (25, 2058200), (40, 1286375), (41, 1255000), (50, 1029100), (82, 627500), (100, 514550), (125, 411640), (164, 313750), (200, 257275), (205, 251000), (250, 205820), (251, 205000), (328, 156875), (410, 125500), (500, 102910), (502, 102500), (625, 82328), (820, 62750), (1000, 51455), (1004, 51250), (1025, 50200), (1250, 41164), (1255, 41000), (1640, 31375), (2008, 25625), (2050, 25100), (2500, 20582), (2510, 20500), (4100, 12550), (5000, 10291), (5020, 10250), (5125, 10040), (6275, 8200)]