21001555197

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{821}}^1\times {\mathrm{2689}}^1$

素因数の和:3674

約数の個数: 48

約数和(自身を含む): 34954333440

約数和(自身を除く): 13952778243

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 821, 1057, 1359, 2463, 2689, 3171, 5747, 7389, 8067, 9513, 17241, 18823, 24201, 51723, 56469, 123971, 169407, 371913, 406039, 867797, 1115739, 1218117, 2207669, 2603391, 2842273, 3654351, 6623007, 7810173, 8526819, 15453683, 19869021, 25580457, 46361049, 139083147, 333358019, 1000074057, 2333506133, 3000222171, 7000518399, 21001555197]

約数ペア:

[(1, 21001555197), (3, 7000518399), (7, 3000222171), (9, 2333506133), (21, 1000074057), (63, 333358019), (151, 139083147), (453, 46361049), (821, 25580457), (1057, 19869021), (1359, 15453683), (2463, 8526819), (2689, 7810173), (3171, 6623007), (5747, 3654351), (7389, 2842273), (8067, 2603391), (9513, 2207669), (17241, 1218117), (18823, 1115739), (24201, 867797), (51723, 406039), (56469, 371913), (123971, 169407)]