21806240

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{8017}}^1$

素因数の和:8049

約数の個数: 48

約数和(自身を含む): 54554472

約数和(自身を除く): 32748232

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 8017, 16034, 32068, 40085, 64136, 80170, 128272, 136289, 160340, 256544, 272578, 320680, 545156, 641360, 681445, 1090312, 1282720, 1362890, 2180624, 2725780, 4361248, 5451560, 10903120, 21806240]

約数ペア:

[(1, 21806240), (2, 10903120), (4, 5451560), (5, 4361248), (8, 2725780), (10, 2180624), (16, 1362890), (17, 1282720), (20, 1090312), (32, 681445), (34, 641360), (40, 545156), (68, 320680), (80, 272578), (85, 256544), (136, 160340), (160, 136289), (170, 128272), (272, 80170), (340, 64136), (544, 40085), (680, 32068), (1360, 16034), (2720, 8017)]