21532420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11831}}^1$

素因数の和:11860

約数の個数: 48

約数和(自身を含む): 55657728

約数和(自身を除く): 34125308

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11831, 23662, 47324, 59155, 82817, 118310, 153803, 165634, 236620, 307606, 331268, 414085, 615212, 769015, 828170, 1076621, 1538030, 1656340, 2153242, 3076060, 4306484, 5383105, 10766210, 21532420]

約数ペア:

[(1, 21532420), (2, 10766210), (4, 5383105), (5, 4306484), (7, 3076060), (10, 2153242), (13, 1656340), (14, 1538030), (20, 1076621), (26, 828170), (28, 769015), (35, 615212), (52, 414085), (65, 331268), (70, 307606), (91, 236620), (130, 165634), (140, 153803), (182, 118310), (260, 82817), (364, 59155), (455, 47324), (910, 23662), (1820, 11831)]