19937988

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:231

約数の個数: 120

約数和(自身を含む): 60984000

約数和(自身を除く): 41046012

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 59, 63, 81, 84, 108, 118, 126, 149, 162, 177, 189, 236, 252, 298, 324, 354, 378, 413, 447, 531, 567, 596, 708, 756, 826, 894, 1043, 1062, 1134, 1239, 1341, 1593, 1652, 1788, 2086, 2124, 2268, 2478, 2682, 3129, 3186, 3717, 4023, 4172, 4779, 4956, 5364, 6258, 6372, 7434, 8046, 8791, 9387, 9558, 11151, 12069, 12516, 14868, 16092, 17582, 18774, 19116, 22302, 24138, 26373, 28161, 33453, 35164, 37548, 44604, 48276, 52746, 56322, 61537, 66906, 79119, 84483, 105492, 112644, 123074, 133812, 158238, 168966, 184611, 237357, 246148, 316476, 337932, 369222, 474714, 553833, 712071, 738444, 949428, 1107666, 1424142, 1661499, 2215332, 2848284, 3322998, 4984497, 6645996, 9968994, 19937988]

約数ペア:

[(1, 19937988), (2, 9968994), (3, 6645996), (4, 4984497), (6, 3322998), (7, 2848284), (9, 2215332), (12, 1661499), (14, 1424142), (18, 1107666), (21, 949428), (27, 738444), (28, 712071), (36, 553833), (42, 474714), (54, 369222), (59, 337932), (63, 316476), (81, 246148), (84, 237357), (108, 184611), (118, 168966), (126, 158238), (149, 133812), (162, 123074), (177, 112644), (189, 105492), (236, 84483), (252, 79119), (298, 66906), (324, 61537), (354, 56322), (378, 52746), (413, 48276), (447, 44604), (531, 37548), (567, 35164), (596, 33453), (708, 28161), (756, 26373), (826, 24138), (894, 22302), (1043, 19116), (1062, 18774), (1134, 17582), (1239, 16092), (1341, 14868), (1593, 12516), (1652, 12069), (1788, 11151), (2086, 9558), (2124, 9387), (2268, 8791), (2478, 8046), (2682, 7434), (3129, 6372), (3186, 6258), (3717, 5364), (4023, 4956), (4172, 4779)]