21437440

素因数分解:

$2^{10}\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:157

約数の個数: 88

約数和(自身を含む): 53058240

約数和(自身を除く): 31620800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 79, 80, 106, 128, 158, 160, 212, 256, 265, 316, 320, 395, 424, 512, 530, 632, 640, 790, 848, 1024, 1060, 1264, 1280, 1580, 1696, 2120, 2528, 2560, 3160, 3392, 4187, 4240, 5056, 5120, 6320, 6784, 8374, 8480, 10112, 12640, 13568, 16748, 16960, 20224, 20935, 25280, 27136, 33496, 33920, 40448, 41870, 50560, 54272, 66992, 67840, 80896, 83740, 101120, 133984, 135680, 167480, 202240, 267968, 271360, 334960, 404480, 535936, 669920, 1071872, 1339840, 2143744, 2679680, 4287488, 5359360, 10718720, 21437440]

約数ペア:

[(1, 21437440), (2, 10718720), (4, 5359360), (5, 4287488), (8, 2679680), (10, 2143744), (16, 1339840), (20, 1071872), (32, 669920), (40, 535936), (53, 404480), (64, 334960), (79, 271360), (80, 267968), (106, 202240), (128, 167480), (158, 135680), (160, 133984), (212, 101120), (256, 83740), (265, 80896), (316, 67840), (320, 66992), (395, 54272), (424, 50560), (512, 41870), (530, 40448), (632, 33920), (640, 33496), (790, 27136), (848, 25280), (1024, 20935), (1060, 20224), (1264, 16960), (1280, 16748), (1580, 13568), (1696, 12640), (2120, 10112), (2528, 8480), (2560, 8374), (3160, 6784), (3392, 6320), (4187, 5120), (4240, 5056)]