21418880

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{683}}^1$

素因数の和:716

約数の個数: 96

約数和(自身を含む): 59651640

約数和(自身を除く): 38232760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 640, 683, 784, 896, 980, 1120, 1366, 1568, 1960, 2240, 2732, 3136, 3415, 3920, 4480, 4781, 5464, 6272, 6830, 7840, 9562, 10928, 13660, 15680, 19124, 21856, 23905, 27320, 31360, 33467, 38248, 43712, 47810, 54640, 66934, 76496, 87424, 95620, 109280, 133868, 152992, 167335, 191240, 218560, 267736, 305984, 334670, 382480, 437120, 535472, 611968, 669340, 764960, 1070944, 1338680, 1529920, 2141888, 2677360, 3059840, 4283776, 5354720, 10709440, 21418880]

約数ペア:

[(1, 21418880), (2, 10709440), (4, 5354720), (5, 4283776), (7, 3059840), (8, 2677360), (10, 2141888), (14, 1529920), (16, 1338680), (20, 1070944), (28, 764960), (32, 669340), (35, 611968), (40, 535472), (49, 437120), (56, 382480), (64, 334670), (70, 305984), (80, 267736), (98, 218560), (112, 191240), (128, 167335), (140, 152992), (160, 133868), (196, 109280), (224, 95620), (245, 87424), (280, 76496), (320, 66934), (392, 54640), (448, 47810), (490, 43712), (560, 38248), (640, 33467), (683, 31360), (784, 27320), (896, 23905), (980, 21856), (1120, 19124), (1366, 15680), (1568, 13660), (1960, 10928), (2240, 9562), (2732, 7840), (3136, 6830), (3415, 6272), (3920, 5464), (4480, 4781)]