78405580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:391

約数の個数: 72

約数和(自身を含む): 182997360

約数和(自身を除く): 104591780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 179, 181, 220, 242, 358, 362, 484, 605, 716, 724, 895, 905, 1210, 1790, 1810, 1969, 1991, 2420, 3580, 3620, 3938, 3982, 7876, 7964, 9845, 9955, 19690, 19910, 21659, 21901, 32399, 39380, 39820, 43318, 43802, 64798, 86636, 87604, 108295, 109505, 129596, 161995, 216590, 219010, 323990, 356389, 433180, 438020, 647980, 712778, 1425556, 1781945, 3563890, 3920279, 7127780, 7840558, 15681116, 19601395, 39202790, 78405580]

約数ペア:

[(1, 78405580), (2, 39202790), (4, 19601395), (5, 15681116), (10, 7840558), (11, 7127780), (20, 3920279), (22, 3563890), (44, 1781945), (55, 1425556), (110, 712778), (121, 647980), (179, 438020), (181, 433180), (220, 356389), (242, 323990), (358, 219010), (362, 216590), (484, 161995), (605, 129596), (716, 109505), (724, 108295), (895, 87604), (905, 86636), (1210, 64798), (1790, 43802), (1810, 43318), (1969, 39820), (1991, 39380), (2420, 32399), (3580, 21901), (3620, 21659), (3938, 19910), (3982, 19690), (7876, 9955), (7964, 9845)]