21117440

素因数分解:

$2^9\times 5^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:209

約数の個数: 80

約数和(自身を含む): 51780168

約数和(自身を除く): 30662728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 113, 128, 146, 160, 226, 256, 292, 320, 365, 452, 512, 565, 584, 640, 730, 904, 1130, 1168, 1280, 1460, 1808, 2260, 2336, 2560, 2920, 3616, 4520, 4672, 5840, 7232, 8249, 9040, 9344, 11680, 14464, 16498, 18080, 18688, 23360, 28928, 32996, 36160, 37376, 41245, 46720, 57856, 65992, 72320, 82490, 93440, 131984, 144640, 164980, 186880, 263968, 289280, 329960, 527936, 659920, 1055872, 1319840, 2111744, 2639680, 4223488, 5279360, 10558720, 21117440]

約数ペア:

[(1, 21117440), (2, 10558720), (4, 5279360), (5, 4223488), (8, 2639680), (10, 2111744), (16, 1319840), (20, 1055872), (32, 659920), (40, 527936), (64, 329960), (73, 289280), (80, 263968), (113, 186880), (128, 164980), (146, 144640), (160, 131984), (226, 93440), (256, 82490), (292, 72320), (320, 65992), (365, 57856), (452, 46720), (512, 41245), (565, 37376), (584, 36160), (640, 32996), (730, 28928), (904, 23360), (1130, 18688), (1168, 18080), (1280, 16498), (1460, 14464), (1808, 11680), (2260, 9344), (2336, 9040), (2560, 8249), (2920, 7232), (3616, 5840), (4520, 4672)]