21991368

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{587}}^1$

素因数の和:826

約数の個数: 64

約数和(自身を含む): 63221760

約数和(自身を除く): 41230392

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168, 223, 446, 587, 669, 892, 1174, 1338, 1561, 1761, 1784, 2348, 2676, 3122, 3522, 4109, 4683, 4696, 5352, 6244, 7044, 8218, 9366, 12327, 12488, 14088, 16436, 18732, 24654, 32872, 37464, 49308, 98616, 130901, 261802, 392703, 523604, 785406, 916307, 1047208, 1570812, 1832614, 2748921, 3141624, 3665228, 5497842, 7330456, 10995684, 21991368]

約数ペア:

[(1, 21991368), (2, 10995684), (3, 7330456), (4, 5497842), (6, 3665228), (7, 3141624), (8, 2748921), (12, 1832614), (14, 1570812), (21, 1047208), (24, 916307), (28, 785406), (42, 523604), (56, 392703), (84, 261802), (168, 130901), (223, 98616), (446, 49308), (587, 37464), (669, 32872), (892, 24654), (1174, 18732), (1338, 16436), (1561, 14088), (1761, 12488), (1784, 12327), (2348, 9366), (2676, 8218), (3122, 7044), (3522, 6244), (4109, 5352), (4683, 4696)]