21316540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1423}}^1$

素因数の和:1546

約数の個数: 48

約数和(自身を含む): 51674112

約数和(自身を除く): 30357572

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 107, 140, 214, 428, 535, 749, 1070, 1423, 1498, 2140, 2846, 2996, 3745, 5692, 7115, 7490, 9961, 14230, 14980, 19922, 28460, 39844, 49805, 99610, 152261, 199220, 304522, 609044, 761305, 1065827, 1522610, 2131654, 3045220, 4263308, 5329135, 10658270, 21316540]

約数ペア:

[(1, 21316540), (2, 10658270), (4, 5329135), (5, 4263308), (7, 3045220), (10, 2131654), (14, 1522610), (20, 1065827), (28, 761305), (35, 609044), (70, 304522), (107, 199220), (140, 152261), (214, 99610), (428, 49805), (535, 39844), (749, 28460), (1070, 19922), (1423, 14980), (1498, 14230), (2140, 9961), (2846, 7490), (2996, 7115), (3745, 5692)]