21405400

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:209

約数の個数: 96

約数和(自身を含む): 54014400

約数和(自身を除く): 32609000

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 43, 50, 76, 86, 95, 100, 131, 152, 172, 190, 200, 215, 262, 344, 380, 430, 475, 524, 655, 760, 817, 860, 950, 1048, 1075, 1310, 1634, 1720, 1900, 2150, 2489, 2620, 3268, 3275, 3800, 4085, 4300, 4978, 5240, 5633, 6536, 6550, 8170, 8600, 9956, 11266, 12445, 13100, 16340, 19912, 20425, 22532, 24890, 26200, 28165, 32680, 40850, 45064, 49780, 56330, 62225, 81700, 99560, 107027, 112660, 124450, 140825, 163400, 214054, 225320, 248900, 281650, 428108, 497800, 535135, 563300, 856216, 1070270, 1126600, 2140540, 2675675, 4281080, 5351350, 10702700, 21405400]

約数ペア:

[(1, 21405400), (2, 10702700), (4, 5351350), (5, 4281080), (8, 2675675), (10, 2140540), (19, 1126600), (20, 1070270), (25, 856216), (38, 563300), (40, 535135), (43, 497800), (50, 428108), (76, 281650), (86, 248900), (95, 225320), (100, 214054), (131, 163400), (152, 140825), (172, 124450), (190, 112660), (200, 107027), (215, 99560), (262, 81700), (344, 62225), (380, 56330), (430, 49780), (475, 45064), (524, 40850), (655, 32680), (760, 28165), (817, 26200), (860, 24890), (950, 22532), (1048, 20425), (1075, 19912), (1310, 16340), (1634, 13100), (1720, 12445), (1900, 11266), (2150, 9956), (2489, 8600), (2620, 8170), (3268, 6550), (3275, 6536), (3800, 5633), (4085, 5240), (4300, 4978)]