21005440

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1427}}^1$

素因数の和:1469

約数の個数: 64

約数和(自身を含む): 52436160

約数和(自身を除く): 31430720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 320, 368, 460, 640, 736, 920, 1427, 1472, 1840, 2854, 2944, 3680, 5708, 7135, 7360, 11416, 14270, 14720, 22832, 28540, 32821, 45664, 57080, 65642, 91328, 114160, 131284, 164105, 182656, 228320, 262568, 328210, 456640, 525136, 656420, 913280, 1050272, 1312840, 2100544, 2625680, 4201088, 5251360, 10502720, 21005440]

約数ペア:

[(1, 21005440), (2, 10502720), (4, 5251360), (5, 4201088), (8, 2625680), (10, 2100544), (16, 1312840), (20, 1050272), (23, 913280), (32, 656420), (40, 525136), (46, 456640), (64, 328210), (80, 262568), (92, 228320), (115, 182656), (128, 164105), (160, 131284), (184, 114160), (230, 91328), (320, 65642), (368, 57080), (460, 45664), (640, 32821), (736, 28540), (920, 22832), (1427, 14720), (1472, 14270), (1840, 11416), (2854, 7360), (2944, 7135), (3680, 5708)]