20923980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{647}}^1$

素因数の和:684

約数の個数: 144

約数和(自身を含む): 74462976

約数和(自身を除く): 53538996

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 49, 55, 60, 66, 70, 77, 84, 98, 105, 110, 132, 140, 147, 154, 165, 196, 210, 220, 231, 245, 294, 308, 330, 385, 420, 462, 490, 539, 588, 647, 660, 735, 770, 924, 980, 1078, 1155, 1294, 1470, 1540, 1617, 1941, 2156, 2310, 2588, 2695, 2940, 3234, 3235, 3882, 4529, 4620, 5390, 6468, 6470, 7117, 7764, 8085, 9058, 9705, 10780, 12940, 13587, 14234, 16170, 18116, 19410, 21351, 22645, 27174, 28468, 31703, 32340, 35585, 38820, 42702, 45290, 49819, 54348, 63406, 67935, 71170, 85404, 90580, 95109, 99638, 106755, 126812, 135870, 142340, 149457, 158515, 190218, 199276, 213510, 249095, 271740, 298914, 317030, 348733, 380436, 427020, 475545, 498190, 597828, 634060, 697466, 747285, 951090, 996380, 1046199, 1394932, 1494570, 1743665, 1902180, 2092398, 2989140, 3487330, 4184796, 5230995, 6974660, 10461990, 20923980]

約数ペア:

[(1, 20923980), (2, 10461990), (3, 6974660), (4, 5230995), (5, 4184796), (6, 3487330), (7, 2989140), (10, 2092398), (11, 1902180), (12, 1743665), (14, 1494570), (15, 1394932), (20, 1046199), (21, 996380), (22, 951090), (28, 747285), (30, 697466), (33, 634060), (35, 597828), (42, 498190), (44, 475545), (49, 427020), (55, 380436), (60, 348733), (66, 317030), (70, 298914), (77, 271740), (84, 249095), (98, 213510), (105, 199276), (110, 190218), (132, 158515), (140, 149457), (147, 142340), (154, 135870), (165, 126812), (196, 106755), (210, 99638), (220, 95109), (231, 90580), (245, 85404), (294, 71170), (308, 67935), (330, 63406), (385, 54348), (420, 49819), (462, 45290), (490, 42702), (539, 38820), (588, 35585), (647, 32340), (660, 31703), (735, 28468), (770, 27174), (924, 22645), (980, 21351), (1078, 19410), (1155, 18116), (1294, 16170), (1470, 14234), (1540, 13587), (1617, 12940), (1941, 10780), (2156, 9705), (2310, 9058), (2588, 8085), (2695, 7764), (2940, 7117), (3234, 6470), (3235, 6468), (3882, 5390), (4529, 4620)]