21488280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:321

約数の個数: 128

約数和(自身を含む): 71608320

約数和(自身を除く): 50120040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 73, 88, 110, 120, 132, 146, 165, 219, 220, 223, 264, 292, 330, 365, 438, 440, 446, 584, 660, 669, 730, 803, 876, 892, 1095, 1115, 1320, 1338, 1460, 1606, 1752, 1784, 2190, 2230, 2409, 2453, 2676, 2920, 3212, 3345, 4015, 4380, 4460, 4818, 4906, 5352, 6424, 6690, 7359, 8030, 8760, 8920, 9636, 9812, 12045, 12265, 13380, 14718, 16060, 16279, 19272, 19624, 24090, 24530, 26760, 29436, 32120, 32558, 36795, 48180, 48837, 49060, 58872, 65116, 73590, 81395, 96360, 97674, 98120, 130232, 147180, 162790, 179069, 195348, 244185, 294360, 325580, 358138, 390696, 488370, 537207, 651160, 716276, 895345, 976740, 1074414, 1432552, 1790690, 1953480, 2148828, 2686035, 3581380, 4297656, 5372070, 7162760, 10744140, 21488280]

約数ペア:

[(1, 21488280), (2, 10744140), (3, 7162760), (4, 5372070), (5, 4297656), (6, 3581380), (8, 2686035), (10, 2148828), (11, 1953480), (12, 1790690), (15, 1432552), (20, 1074414), (22, 976740), (24, 895345), (30, 716276), (33, 651160), (40, 537207), (44, 488370), (55, 390696), (60, 358138), (66, 325580), (73, 294360), (88, 244185), (110, 195348), (120, 179069), (132, 162790), (146, 147180), (165, 130232), (219, 98120), (220, 97674), (223, 96360), (264, 81395), (292, 73590), (330, 65116), (365, 58872), (438, 49060), (440, 48837), (446, 48180), (584, 36795), (660, 32558), (669, 32120), (730, 29436), (803, 26760), (876, 24530), (892, 24090), (1095, 19624), (1115, 19272), (1320, 16279), (1338, 16060), (1460, 14718), (1606, 13380), (1752, 12265), (1784, 12045), (2190, 9812), (2230, 9636), (2409, 8920), (2453, 8760), (2676, 8030), (2920, 7359), (3212, 6690), (3345, 6424), (4015, 5352), (4380, 4906), (4460, 4818)]