21493990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{1543}}^1$

素因数の和:1756

約数の個数: 32

約数和(自身を含む): 44467200

約数和(自身を除く): 22973210

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 199, 398, 995, 1393, 1543, 1990, 2786, 3086, 6965, 7715, 10801, 13930, 15430, 21602, 54005, 108010, 307057, 614114, 1535285, 2149399, 3070570, 4298798, 10746995, 21493990]

約数ペア:

[(1, 21493990), (2, 10746995), (5, 4298798), (7, 3070570), (10, 2149399), (14, 1535285), (35, 614114), (70, 307057), (199, 108010), (398, 54005), (995, 21602), (1393, 15430), (1543, 13930), (1990, 10801), (2786, 7715), (3086, 6965)]