21007740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1171}}^1$

素因数の和:1219

約数の個数: 96

約数和(自身を含む): 66157056

約数和(自身を除く): 45149316

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 23, 26, 30, 39, 46, 52, 60, 65, 69, 78, 92, 115, 130, 138, 156, 195, 230, 260, 276, 299, 345, 390, 460, 598, 690, 780, 897, 1171, 1196, 1380, 1495, 1794, 2342, 2990, 3513, 3588, 4485, 4684, 5855, 5980, 7026, 8970, 11710, 14052, 15223, 17565, 17940, 23420, 26933, 30446, 35130, 45669, 53866, 60892, 70260, 76115, 80799, 91338, 107732, 134665, 152230, 161598, 182676, 228345, 269330, 304460, 323196, 350129, 403995, 456690, 538660, 700258, 807990, 913380, 1050387, 1400516, 1615980, 1750645, 2100774, 3501290, 4201548, 5251935, 7002580, 10503870, 21007740]

約数ペア:

[(1, 21007740), (2, 10503870), (3, 7002580), (4, 5251935), (5, 4201548), (6, 3501290), (10, 2100774), (12, 1750645), (13, 1615980), (15, 1400516), (20, 1050387), (23, 913380), (26, 807990), (30, 700258), (39, 538660), (46, 456690), (52, 403995), (60, 350129), (65, 323196), (69, 304460), (78, 269330), (92, 228345), (115, 182676), (130, 161598), (138, 152230), (156, 134665), (195, 107732), (230, 91338), (260, 80799), (276, 76115), (299, 70260), (345, 60892), (390, 53866), (460, 45669), (598, 35130), (690, 30446), (780, 26933), (897, 23420), (1171, 17940), (1196, 17565), (1380, 15223), (1495, 14052), (1794, 11710), (2342, 8970), (2990, 7026), (3513, 5980), (3588, 5855), (4485, 4684)]