21301760

素因数分解:

$2^9\times 5^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:233

約数の個数: 80

約数和(自身を含む): 52369416

約数和(自身を除く): 31067656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 157, 160, 212, 256, 265, 314, 320, 424, 512, 530, 628, 640, 785, 848, 1060, 1256, 1280, 1570, 1696, 2120, 2512, 2560, 3140, 3392, 4240, 5024, 6280, 6784, 8321, 8480, 10048, 12560, 13568, 16642, 16960, 20096, 25120, 27136, 33284, 33920, 40192, 41605, 50240, 66568, 67840, 80384, 83210, 100480, 133136, 135680, 166420, 200960, 266272, 332840, 401920, 532544, 665680, 1065088, 1331360, 2130176, 2662720, 4260352, 5325440, 10650880, 21301760]

約数ペア:

[(1, 21301760), (2, 10650880), (4, 5325440), (5, 4260352), (8, 2662720), (10, 2130176), (16, 1331360), (20, 1065088), (32, 665680), (40, 532544), (53, 401920), (64, 332840), (80, 266272), (106, 200960), (128, 166420), (157, 135680), (160, 133136), (212, 100480), (256, 83210), (265, 80384), (314, 67840), (320, 66568), (424, 50240), (512, 41605), (530, 40192), (628, 33920), (640, 33284), (785, 27136), (848, 25120), (1060, 20096), (1256, 16960), (1280, 16642), (1570, 13568), (1696, 12560), (2120, 10048), (2512, 8480), (2560, 8321), (3140, 6784), (3392, 6280), (4240, 5024)]