21503415

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 35569152

約数和(自身を除く): 14065737

約数列:

[1, 3, 5, 15, 61, 71, 183, 213, 305, 331, 355, 915, 993, 1065, 1655, 4331, 4965, 12993, 20191, 21655, 23501, 60573, 64965, 70503, 100955, 117505, 302865, 352515, 1433561, 4300683, 7167805, 21503415]

約数ペア:

[(1, 21503415), (3, 7167805), (5, 4300683), (15, 1433561), (61, 352515), (71, 302865), (183, 117505), (213, 100955), (305, 70503), (331, 64965), (355, 60573), (915, 23501), (993, 21655), (1065, 20191), (1655, 12993), (4331, 4965)]