20548480

素因数分解:

$2^7\times 5^1\times {\mathrm{97}}^1\times {\mathrm{331}}^1$

素因数の和:447

約数の個数: 64

約数和(自身を含む): 49780080

約数和(自身を除く): 29231600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 128, 160, 194, 320, 331, 388, 485, 640, 662, 776, 970, 1324, 1552, 1655, 1940, 2648, 3104, 3310, 3880, 5296, 6208, 6620, 7760, 10592, 12416, 13240, 15520, 21184, 26480, 31040, 32107, 42368, 52960, 62080, 64214, 105920, 128428, 160535, 211840, 256856, 321070, 513712, 642140, 1027424, 1284280, 2054848, 2568560, 4109696, 5137120, 10274240, 20548480]

約数ペア:

[(1, 20548480), (2, 10274240), (4, 5137120), (5, 4109696), (8, 2568560), (10, 2054848), (16, 1284280), (20, 1027424), (32, 642140), (40, 513712), (64, 321070), (80, 256856), (97, 211840), (128, 160535), (160, 128428), (194, 105920), (320, 64214), (331, 62080), (388, 52960), (485, 42368), (640, 32107), (662, 31040), (776, 26480), (970, 21184), (1324, 15520), (1552, 13240), (1655, 12416), (1940, 10592), (2648, 7760), (3104, 6620), (3310, 6208), (3880, 5296)]