20495680

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{3371}}^1$

素因数の和:3407

約数の個数: 56

約数和(自身を含む): 51389280

約数和(自身を除く): 30893600

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 152, 160, 190, 304, 320, 380, 608, 760, 1216, 1520, 3040, 3371, 6080, 6742, 13484, 16855, 26968, 33710, 53936, 64049, 67420, 107872, 128098, 134840, 215744, 256196, 269680, 320245, 512392, 539360, 640490, 1024784, 1078720, 1280980, 2049568, 2561960, 4099136, 5123920, 10247840, 20495680]

約数ペア:

[(1, 20495680), (2, 10247840), (4, 5123920), (5, 4099136), (8, 2561960), (10, 2049568), (16, 1280980), (19, 1078720), (20, 1024784), (32, 640490), (38, 539360), (40, 512392), (64, 320245), (76, 269680), (80, 256196), (95, 215744), (152, 134840), (160, 128098), (190, 107872), (304, 67420), (320, 64049), (380, 53936), (608, 33710), (760, 26968), (1216, 16855), (1520, 13484), (3040, 6742), (3371, 6080)]