19991002

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{257}}^1$

素因数の和:390

約数の個数: 32

約数和(自身を含む): 33436800

約数和(自身を除く): 13445798

約数列:

[1, 2, 19, 23, 38, 46, 89, 178, 257, 437, 514, 874, 1691, 2047, 3382, 4094, 4883, 5911, 9766, 11822, 22873, 38893, 45746, 77786, 112309, 224618, 434587, 526079, 869174, 1052158, 9995501, 19991002]

約数ペア:

[(1, 19991002), (2, 9995501), (19, 1052158), (23, 869174), (38, 526079), (46, 434587), (89, 224618), (178, 112309), (257, 77786), (437, 45746), (514, 38893), (874, 22873), (1691, 11822), (2047, 9766), (3382, 5911), (4094, 4883)]