251012905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 380153088

約数和(自身を除く): 129140183

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 107, 143, 187, 193, 221, 535, 715, 935, 965, 1105, 1177, 1391, 1819, 2123, 2431, 2509, 3281, 5885, 6955, 9095, 10615, 12155, 12545, 15301, 16405, 20009, 20651, 23647, 27599, 36091, 42653, 76505, 100045, 103255, 118235, 137995, 180455, 213265, 227161, 260117, 268463, 351067, 469183, 1135805, 1300585, 1342315, 1755335, 2345915, 2953093, 3861737, 4563871, 14765465, 19308685, 22819355, 50202581, 251012905]

約数ペア:

[(1, 251012905), (5, 50202581), (11, 22819355), (13, 19308685), (17, 14765465), (55, 4563871), (65, 3861737), (85, 2953093), (107, 2345915), (143, 1755335), (187, 1342315), (193, 1300585), (221, 1135805), (535, 469183), (715, 351067), (935, 268463), (965, 260117), (1105, 227161), (1177, 213265), (1391, 180455), (1819, 137995), (2123, 118235), (2431, 103255), (2509, 100045), (3281, 76505), (5885, 42653), (6955, 36091), (9095, 27599), (10615, 23647), (12155, 20651), (12545, 20009), (15301, 16405)]