31238740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{877}}^1$

素因数の和:1036

約数の個数: 48

約数和(自身を含む): 71244432

約数和(自身を除く): 40005692

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 137, 260, 274, 548, 685, 877, 1370, 1754, 1781, 2740, 3508, 3562, 4385, 7124, 8770, 8905, 11401, 17540, 17810, 22802, 35620, 45604, 57005, 114010, 120149, 228020, 240298, 480596, 600745, 1201490, 1561937, 2402980, 3123874, 6247748, 7809685, 15619370, 31238740]

約数ペア:

[(1, 31238740), (2, 15619370), (4, 7809685), (5, 6247748), (10, 3123874), (13, 2402980), (20, 1561937), (26, 1201490), (52, 600745), (65, 480596), (130, 240298), (137, 228020), (260, 120149), (274, 114010), (548, 57005), (685, 45604), (877, 35620), (1370, 22802), (1754, 17810), (1781, 17540), (2740, 11401), (3508, 8905), (3562, 8770), (4385, 7124)]