251912780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{157}}^2$

素因数の和:403

約数の個数: 72

約数和(自身を含む): 616801248

約数和(自身を除く): 364888468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 157, 292, 314, 365, 511, 628, 730, 785, 1022, 1099, 1460, 1570, 2044, 2198, 2555, 3140, 4396, 5110, 5495, 10220, 10990, 11461, 21980, 22922, 24649, 45844, 49298, 57305, 80227, 98596, 114610, 123245, 160454, 172543, 229220, 246490, 320908, 345086, 401135, 492980, 690172, 802270, 862715, 1604540, 1725430, 1799377, 3450860, 3598754, 7197508, 8996885, 12595639, 17993770, 25191278, 35987540, 50382556, 62978195, 125956390, 251912780]

約数ペア:

[(1, 251912780), (2, 125956390), (4, 62978195), (5, 50382556), (7, 35987540), (10, 25191278), (14, 17993770), (20, 12595639), (28, 8996885), (35, 7197508), (70, 3598754), (73, 3450860), (140, 1799377), (146, 1725430), (157, 1604540), (292, 862715), (314, 802270), (365, 690172), (511, 492980), (628, 401135), (730, 345086), (785, 320908), (1022, 246490), (1099, 229220), (1460, 172543), (1570, 160454), (2044, 123245), (2198, 114610), (2555, 98596), (3140, 80227), (4396, 57305), (5110, 49298), (5495, 45844), (10220, 24649), (10990, 22922), (11461, 21980)]