398699990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:238

約数の個数: 128

約数和(自身を含む): 867041280

約数和(自身を除く): 468341290

約数列:

[1, 2, 5, 10, 13, 19, 26, 31, 38, 41, 62, 65, 82, 95, 127, 130, 155, 190, 205, 247, 254, 310, 403, 410, 494, 533, 589, 635, 779, 806, 1066, 1178, 1235, 1270, 1271, 1558, 1651, 2015, 2413, 2470, 2542, 2665, 2945, 3302, 3895, 3937, 4030, 4826, 5207, 5330, 5890, 6355, 7657, 7790, 7874, 8255, 10127, 10414, 12065, 12710, 15314, 16510, 16523, 19685, 20254, 24130, 24149, 26035, 31369, 33046, 38285, 39370, 48298, 50635, 51181, 52070, 62738, 67691, 74803, 76570, 82615, 98933, 101270, 102362, 120745, 135382, 149606, 156845, 161417, 165230, 197866, 241490, 255905, 313690, 313937, 322834, 338455, 374015, 494665, 511810, 627874, 676910, 748030, 807085, 972439, 989330, 1286129, 1569685, 1614170, 1944878, 2098421, 2572258, 3066923, 3139370, 4196842, 4862195, 6133846, 6430645, 9724390, 10492105, 12861290, 15334615, 20984210, 30669230, 39869999, 79739998, 199349995, 398699990]

約数ペア:

[(1, 398699990), (2, 199349995), (5, 79739998), (10, 39869999), (13, 30669230), (19, 20984210), (26, 15334615), (31, 12861290), (38, 10492105), (41, 9724390), (62, 6430645), (65, 6133846), (82, 4862195), (95, 4196842), (127, 3139370), (130, 3066923), (155, 2572258), (190, 2098421), (205, 1944878), (247, 1614170), (254, 1569685), (310, 1286129), (403, 989330), (410, 972439), (494, 807085), (533, 748030), (589, 676910), (635, 627874), (779, 511810), (806, 494665), (1066, 374015), (1178, 338455), (1235, 322834), (1270, 313937), (1271, 313690), (1558, 255905), (1651, 241490), (2015, 197866), (2413, 165230), (2470, 161417), (2542, 156845), (2665, 149606), (2945, 135382), (3302, 120745), (3895, 102362), (3937, 101270), (4030, 98933), (4826, 82615), (5207, 76570), (5330, 74803), (5890, 67691), (6355, 62738), (7657, 52070), (7790, 51181), (7874, 50635), (8255, 48298), (10127, 39370), (10414, 38285), (12065, 33046), (12710, 31369), (15314, 26035), (16510, 24149), (16523, 24130), (19685, 20254)]