209670400

素因数分解:

$2^8\times 5^2\times {\mathrm{181}}^2$

素因数の和:388

約数の個数: 81

約数和(自身を含む): 521850063

約数和(自身を除く): 312179663

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 181, 200, 256, 320, 362, 400, 640, 724, 800, 905, 1280, 1448, 1600, 1810, 2896, 3200, 3620, 4525, 5792, 6400, 7240, 9050, 11584, 14480, 18100, 23168, 28960, 32761, 36200, 46336, 57920, 65522, 72400, 115840, 131044, 144800, 163805, 231680, 262088, 289600, 327610, 524176, 579200, 655220, 819025, 1048352, 1158400, 1310440, 1638050, 2096704, 2620880, 3276100, 4193408, 5241760, 6552200, 8386816, 10483520, 13104400, 20967040, 26208800, 41934080, 52417600, 104835200, 209670400]

約数ペア:

[(1, 209670400), (2, 104835200), (4, 52417600), (5, 41934080), (8, 26208800), (10, 20967040), (16, 13104400), (20, 10483520), (25, 8386816), (32, 6552200), (40, 5241760), (50, 4193408), (64, 3276100), (80, 2620880), (100, 2096704), (128, 1638050), (160, 1310440), (181, 1158400), (200, 1048352), (256, 819025), (320, 655220), (362, 579200), (400, 524176), (640, 327610), (724, 289600), (800, 262088), (905, 231680), (1280, 163805), (1448, 144800), (1600, 131044), (1810, 115840), (2896, 72400), (3200, 65522), (3620, 57920), (4525, 46336), (5792, 36200), (6400, 32761), (7240, 28960), (9050, 23168), (11584, 18100)]