21451870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 44997120

約数和(自身を除く): 23545250

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 61, 110, 115, 122, 139, 230, 253, 278, 305, 506, 610, 671, 695, 1265, 1342, 1390, 1403, 1529, 2530, 2806, 3058, 3197, 3355, 6394, 6710, 7015, 7645, 8479, 14030, 15290, 15433, 15985, 16958, 30866, 31970, 35167, 42395, 70334, 77165, 84790, 93269, 154330, 175835, 186538, 195017, 351670, 390034, 466345, 932690, 975085, 1950170, 2145187, 4290374, 10725935, 21451870]

約数ペア:

[(1, 21451870), (2, 10725935), (5, 4290374), (10, 2145187), (11, 1950170), (22, 975085), (23, 932690), (46, 466345), (55, 390034), (61, 351670), (110, 195017), (115, 186538), (122, 175835), (139, 154330), (230, 93269), (253, 84790), (278, 77165), (305, 70334), (506, 42395), (610, 35167), (671, 31970), (695, 30866), (1265, 16958), (1342, 15985), (1390, 15433), (1403, 15290), (1529, 14030), (2530, 8479), (2806, 7645), (3058, 7015), (3197, 6710), (3355, 6394)]