28719855

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 51554880

約数和(自身を除く): 22835025

約数列:

[1, 3, 5, 9, 15, 45, 71, 89, 101, 213, 267, 303, 355, 445, 505, 639, 801, 909, 1065, 1335, 1515, 3195, 4005, 4545, 6319, 7171, 8989, 18957, 21513, 26967, 31595, 35855, 44945, 56871, 64539, 80901, 94785, 107565, 134835, 284355, 322695, 404505, 638219, 1914657, 3191095, 5743971, 9573285, 28719855]

約数ペア:

[(1, 28719855), (3, 9573285), (5, 5743971), (9, 3191095), (15, 1914657), (45, 638219), (71, 404505), (89, 322695), (101, 284355), (213, 134835), (267, 107565), (303, 94785), (355, 80901), (445, 64539), (505, 56871), (639, 44945), (801, 35855), (909, 31595), (1065, 26967), (1335, 21513), (1515, 18957), (3195, 8989), (4005, 7171), (4545, 6319)]