21697456

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:170

約数の個数: 80

約数和(自身を含む): 48711168

約数和(自身を除く): 27013712

約数列:

[1, 2, 4, 8, 11, 16, 22, 43, 44, 47, 61, 86, 88, 94, 122, 172, 176, 188, 244, 344, 376, 473, 488, 517, 671, 688, 752, 946, 976, 1034, 1342, 1892, 2021, 2068, 2623, 2684, 2867, 3784, 4042, 4136, 5246, 5368, 5734, 7568, 8084, 8272, 10492, 10736, 11468, 16168, 20984, 22231, 22936, 28853, 31537, 32336, 41968, 44462, 45872, 57706, 63074, 88924, 115412, 123281, 126148, 177848, 230824, 246562, 252296, 355696, 461648, 493124, 504592, 986248, 1356091, 1972496, 2712182, 5424364, 10848728, 21697456]

約数ペア:

[(1, 21697456), (2, 10848728), (4, 5424364), (8, 2712182), (11, 1972496), (16, 1356091), (22, 986248), (43, 504592), (44, 493124), (47, 461648), (61, 355696), (86, 252296), (88, 246562), (94, 230824), (122, 177848), (172, 126148), (176, 123281), (188, 115412), (244, 88924), (344, 63074), (376, 57706), (473, 45872), (488, 44462), (517, 41968), (671, 32336), (688, 31537), (752, 28853), (946, 22936), (976, 22231), (1034, 20984), (1342, 16168), (1892, 11468), (2021, 10736), (2068, 10492), (2623, 8272), (2684, 8084), (2867, 7568), (3784, 5734), (4042, 5368), (4136, 5246)]