19991439

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2$

素因数の和:101

約数の個数: 72

約数和(自身を含む): 36232560

約数和(自身を除く): 16241121

約数列:

[1, 3, 9, 13, 17, 19, 23, 39, 51, 57, 69, 117, 153, 171, 207, 221, 247, 299, 323, 391, 437, 529, 663, 741, 897, 969, 1173, 1311, 1587, 1989, 2223, 2691, 2907, 3519, 3933, 4199, 4761, 5083, 5681, 6877, 7429, 8993, 10051, 12597, 15249, 17043, 20631, 22287, 26979, 30153, 37791, 45747, 51129, 61893, 66861, 80937, 90459, 96577, 116909, 130663, 170867, 289731, 350727, 391989, 512601, 869193, 1052181, 1175967, 1537803, 2221271, 6663813, 19991439]

約数ペア:

[(1, 19991439), (3, 6663813), (9, 2221271), (13, 1537803), (17, 1175967), (19, 1052181), (23, 869193), (39, 512601), (51, 391989), (57, 350727), (69, 289731), (117, 170867), (153, 130663), (171, 116909), (207, 96577), (221, 90459), (247, 80937), (299, 66861), (323, 61893), (391, 51129), (437, 45747), (529, 37791), (663, 30153), (741, 26979), (897, 22287), (969, 20631), (1173, 17043), (1311, 15249), (1587, 12597), (1989, 10051), (2223, 8993), (2691, 7429), (2907, 6877), (3519, 5681), (3933, 5083), (4199, 4761)]