21416960

素因数分解:

$2^{10}\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 88

約数和(自身を含む): 53058240

約数和(自身を除く): 31641280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 89, 94, 128, 160, 178, 188, 235, 256, 320, 356, 376, 445, 470, 512, 640, 712, 752, 890, 940, 1024, 1280, 1424, 1504, 1780, 1880, 2560, 2848, 3008, 3560, 3760, 4183, 5120, 5696, 6016, 7120, 7520, 8366, 11392, 12032, 14240, 15040, 16732, 20915, 22784, 24064, 28480, 30080, 33464, 41830, 45568, 48128, 56960, 60160, 66928, 83660, 91136, 113920, 120320, 133856, 167320, 227840, 240640, 267712, 334640, 455680, 535424, 669280, 1070848, 1338560, 2141696, 2677120, 4283392, 5354240, 10708480, 21416960]

約数ペア:

[(1, 21416960), (2, 10708480), (4, 5354240), (5, 4283392), (8, 2677120), (10, 2141696), (16, 1338560), (20, 1070848), (32, 669280), (40, 535424), (47, 455680), (64, 334640), (80, 267712), (89, 240640), (94, 227840), (128, 167320), (160, 133856), (178, 120320), (188, 113920), (235, 91136), (256, 83660), (320, 66928), (356, 60160), (376, 56960), (445, 48128), (470, 45568), (512, 41830), (640, 33464), (712, 30080), (752, 28480), (890, 24064), (940, 22784), (1024, 20915), (1280, 16732), (1424, 15040), (1504, 14240), (1780, 12032), (1880, 11392), (2560, 8366), (2848, 7520), (3008, 7120), (3560, 6016), (3760, 5696), (4183, 5120)]