18656240

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3823}}^1$

素因数の和:3897

約数の個数: 40

約数和(自身を含む): 44098368

約数和(自身を除く): 25442128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 3823, 4880, 7646, 15292, 19115, 30584, 38230, 61168, 76460, 152920, 233203, 305840, 466406, 932812, 1166015, 1865624, 2332030, 3731248, 4664060, 9328120, 18656240]

約数ペア:

[(1, 18656240), (2, 9328120), (4, 4664060), (5, 3731248), (8, 2332030), (10, 1865624), (16, 1166015), (20, 932812), (40, 466406), (61, 305840), (80, 233203), (122, 152920), (244, 76460), (305, 61168), (488, 38230), (610, 30584), (976, 19115), (1220, 15292), (2440, 7646), (3823, 4880)]