21030400

素因数分解:

$2^9\times 5^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:112

約数の個数: 120

約数和(自身を含む): 54800064

約数和(自身を除く): 33769664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 53, 62, 64, 80, 100, 106, 124, 128, 155, 160, 200, 212, 248, 256, 265, 310, 320, 400, 424, 496, 512, 530, 620, 640, 775, 800, 848, 992, 1060, 1240, 1280, 1325, 1550, 1600, 1643, 1696, 1984, 2120, 2480, 2560, 2650, 3100, 3200, 3286, 3392, 3968, 4240, 4960, 5300, 6200, 6400, 6572, 6784, 7936, 8215, 8480, 9920, 10600, 12400, 12800, 13144, 13568, 15872, 16430, 16960, 19840, 21200, 24800, 26288, 27136, 32860, 33920, 39680, 41075, 42400, 49600, 52576, 65720, 67840, 79360, 82150, 84800, 99200, 105152, 131440, 135680, 164300, 169600, 198400, 210304, 262880, 328600, 339200, 396800, 420608, 525760, 657200, 678400, 841216, 1051520, 1314400, 2103040, 2628800, 4206080, 5257600, 10515200, 21030400]

約数ペア:

[(1, 21030400), (2, 10515200), (4, 5257600), (5, 4206080), (8, 2628800), (10, 2103040), (16, 1314400), (20, 1051520), (25, 841216), (31, 678400), (32, 657200), (40, 525760), (50, 420608), (53, 396800), (62, 339200), (64, 328600), (80, 262880), (100, 210304), (106, 198400), (124, 169600), (128, 164300), (155, 135680), (160, 131440), (200, 105152), (212, 99200), (248, 84800), (256, 82150), (265, 79360), (310, 67840), (320, 65720), (400, 52576), (424, 49600), (496, 42400), (512, 41075), (530, 39680), (620, 33920), (640, 32860), (775, 27136), (800, 26288), (848, 24800), (992, 21200), (1060, 19840), (1240, 16960), (1280, 16430), (1325, 15872), (1550, 13568), (1600, 13144), (1643, 12800), (1696, 12400), (1984, 10600), (2120, 9920), (2480, 8480), (2560, 8215), (2650, 7936), (3100, 6784), (3200, 6572), (3286, 6400), (3392, 6200), (3968, 5300), (4240, 4960)]