20872960

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{709}}^1$

素因数の和:753

約数の個数: 72

約数和(自身を含む): 52244640

約数和(自身を除く): 31371680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 709, 736, 920, 1280, 1418, 1472, 1840, 2836, 2944, 3545, 3680, 5672, 5888, 7090, 7360, 11344, 14180, 14720, 16307, 22688, 28360, 29440, 32614, 45376, 56720, 65228, 81535, 90752, 113440, 130456, 163070, 181504, 226880, 260912, 326140, 453760, 521824, 652280, 907520, 1043648, 1304560, 2087296, 2609120, 4174592, 5218240, 10436480, 20872960]

約数ペア:

[(1, 20872960), (2, 10436480), (4, 5218240), (5, 4174592), (8, 2609120), (10, 2087296), (16, 1304560), (20, 1043648), (23, 907520), (32, 652280), (40, 521824), (46, 453760), (64, 326140), (80, 260912), (92, 226880), (115, 181504), (128, 163070), (160, 130456), (184, 113440), (230, 90752), (256, 81535), (320, 65228), (368, 56720), (460, 45376), (640, 32614), (709, 29440), (736, 28360), (920, 22688), (1280, 16307), (1418, 14720), (1472, 14180), (1840, 11344), (2836, 7360), (2944, 7090), (3545, 5888), (3680, 5672)]