20740480

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1409}}^1$

素因数の和:1451

約数の個数: 64

約数和(自身を含む): 51775200

約数和(自身を除く): 31034720

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, 1409, 1472, 1840, 2818, 2944, 3680, 5636, 7045, 7360, 11272, 14090, 14720, 22544, 28180, 32407, 45088, 56360, 64814, 90176, 112720, 129628, 162035, 180352, 225440, 259256, 324070, 450880, 518512, 648140, 901760, 1037024, 1296280, 2074048, 2592560, 4148096, 5185120, 10370240, 20740480]

約数ペア:

[(1, 20740480), (2, 10370240), (4, 5185120), (5, 4148096), (8, 2592560), (10, 2074048), (16, 1296280), (20, 1037024), (23, 901760), (32, 648140), (40, 518512), (46, 450880), (64, 324070), (80, 259256), (92, 225440), (115, 180352), (128, 162035), (160, 129628), (184, 112720), (230, 90176), (320, 64814), (368, 56360), (460, 45088), (640, 32407), (736, 28180), (920, 22544), (1409, 14720), (1472, 14090), (1840, 11272), (2818, 7360), (2944, 7045), (3680, 5636)]