19904742

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:99

約数の個数: 144

約数和(自身を含む): 55189680

約数和(自身を除く): 35284938

約数列:

[1, 2, 3, 6, 9, 11, 13, 18, 19, 22, 26, 33, 37, 38, 39, 57, 66, 74, 78, 99, 111, 114, 117, 121, 143, 171, 198, 209, 222, 234, 242, 247, 286, 333, 342, 363, 407, 418, 429, 481, 494, 627, 666, 703, 726, 741, 814, 858, 962, 1089, 1221, 1254, 1287, 1406, 1443, 1482, 1573, 1881, 2109, 2178, 2223, 2299, 2442, 2574, 2717, 2886, 3146, 3663, 3762, 4218, 4329, 4446, 4477, 4598, 4719, 5291, 5434, 6327, 6897, 7326, 7733, 8151, 8658, 8954, 9139, 9438, 10582, 12654, 13431, 13794, 14157, 15466, 15873, 16302, 18278, 20691, 23199, 24453, 26862, 27417, 28314, 29887, 31746, 40293, 41382, 46398, 47619, 48906, 54834, 58201, 59774, 69597, 80586, 82251, 85063, 89661, 95238, 100529, 116402, 139194, 164502, 170126, 174603, 179322, 201058, 255189, 268983, 301587, 349206, 510378, 523809, 537966, 603174, 765567, 904761, 1047618, 1105819, 1531134, 1809522, 2211638, 3317457, 6634914, 9952371, 19904742]

約数ペア:

[(1, 19904742), (2, 9952371), (3, 6634914), (6, 3317457), (9, 2211638), (11, 1809522), (13, 1531134), (18, 1105819), (19, 1047618), (22, 904761), (26, 765567), (33, 603174), (37, 537966), (38, 523809), (39, 510378), (57, 349206), (66, 301587), (74, 268983), (78, 255189), (99, 201058), (111, 179322), (114, 174603), (117, 170126), (121, 164502), (143, 139194), (171, 116402), (198, 100529), (209, 95238), (222, 89661), (234, 85063), (242, 82251), (247, 80586), (286, 69597), (333, 59774), (342, 58201), (363, 54834), (407, 48906), (418, 47619), (429, 46398), (481, 41382), (494, 40293), (627, 31746), (666, 29887), (703, 28314), (726, 27417), (741, 26862), (814, 24453), (858, 23199), (962, 20691), (1089, 18278), (1221, 16302), (1254, 15873), (1287, 15466), (1406, 14157), (1443, 13794), (1482, 13431), (1573, 12654), (1881, 10582), (2109, 9438), (2178, 9139), (2223, 8954), (2299, 8658), (2442, 8151), (2574, 7733), (2717, 7326), (2886, 6897), (3146, 6327), (3663, 5434), (3762, 5291), (4218, 4719), (4329, 4598), (4446, 4477)]