81053440

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4871}}^1$

素因数の和:4905

約数の個数: 72

約数和(自身を含む): 209125728

約数和(自身を除く): 128072288

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1664, 2080, 3328, 4160, 4871, 8320, 9742, 16640, 19484, 24355, 38968, 48710, 63323, 77936, 97420, 126646, 155872, 194840, 253292, 311744, 316615, 389680, 506584, 623488, 633230, 779360, 1013168, 1246976, 1266460, 1558720, 2026336, 2532920, 3117440, 4052672, 5065840, 6234880, 8105344, 10131680, 16210688, 20263360, 40526720, 81053440]

約数ペア:

[(1, 81053440), (2, 40526720), (4, 20263360), (5, 16210688), (8, 10131680), (10, 8105344), (13, 6234880), (16, 5065840), (20, 4052672), (26, 3117440), (32, 2532920), (40, 2026336), (52, 1558720), (64, 1266460), (65, 1246976), (80, 1013168), (104, 779360), (128, 633230), (130, 623488), (160, 506584), (208, 389680), (256, 316615), (260, 311744), (320, 253292), (416, 194840), (520, 155872), (640, 126646), (832, 97420), (1040, 77936), (1280, 63323), (1664, 48710), (2080, 38968), (3328, 24355), (4160, 19484), (4871, 16640), (8320, 9742)]